diff --git a/Cargo.lock b/Cargo.lock
index fc8644fef..3ca7b39a3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,32 +2,31 @@
 # It is not intended for manual editing.
 [[package]]
 name = "aes"
-version = "0.2.0"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "aes-soft 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "aesni 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "block-cipher-trait 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aes-soft 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aesni 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "aes-soft"
-version = "0.2.0"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "block-cipher-trait 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "byte-tools 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "aesni"
-version = "0.4.1"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "block-cipher-trait 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "stream-cipher 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -37,20 +36,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "arrayvec"
-version = "0.4.10"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "autocfg"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bech32"
-version = "0.6.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -58,13 +57,13 @@ name = "bellman"
 version = "0.1.0"
 dependencies = [
  "bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ff 0.4.0",
- "futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "group 0.1.0",
- "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pairing 0.14.2",
  "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -77,64 +76,59 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "blake2b_simd"
-version = "0.5.1"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "blake2s_simd"
-version = "0.5.1"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "block-buffer"
-version = "0.7.0"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "block-padding 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byte-tools 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "generic-array 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-padding 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "block-cipher-trait"
-version = "0.5.3"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "block-padding"
-version = "0.1.2"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byte-tools 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "byte-tools"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "byte-tools"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "byteorder"
-version = "1.2.2"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -146,6 +140,11 @@ dependencies = [
  "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "cfg-if"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.3"
@@ -163,7 +162,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "crypto_api_chachapoly"
-version = "0.1.8"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "crypto_api 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -171,18 +170,10 @@ dependencies = [
 
 [[package]]
 name = "digest"
-version = "0.7.2"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "digest"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "generic-array 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -190,7 +181,7 @@ name = "directories"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.61 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -203,7 +194,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "ff"
 version = "0.4.0"
 dependencies = [
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ff_derive 0.3.0",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -212,29 +203,29 @@ dependencies = [
 name = "ff_derive"
 version = "0.3.0"
 dependencies = [
- "num-bigint 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-bigint 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "fpe"
-version = "0.1.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "aes 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-bigint 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aes 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-bigint 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "futures"
-version = "0.1.21"
+version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -242,21 +233,13 @@ name = "futures-cpupool"
 version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "generic-array"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "generic-array"
-version = "0.12.0"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -264,11 +247,11 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.1.6"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.61 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -287,32 +270,29 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "hex-literal"
-version = "0.1.1"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "hex-literal-impl 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex-literal-impl 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "hex-literal-impl"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "lazy_static"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "libc"
-version = "0.2.59"
+version = "0.2.61"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -320,15 +300,15 @@ name = "librustzcash"
 version = "0.1.0"
 dependencies = [
  "bellman 0.1.0",
- "blake2b_simd 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "blake2s_simd 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2b_simd 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2s_simd 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ff 0.4.0",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.61 (registry+https://github.com/rust-lang/crates.io-index)",
  "pairing 0.14.2",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_os 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_os 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "sapling-crypto 0.0.1",
  "zcash_primitives 0.0.0",
  "zcash_proofs 0.0.0",
@@ -336,54 +316,53 @@ dependencies = [
 
 [[package]]
 name = "nodrop"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "num-bigint"
-version = "0.2.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-integer"
-version = "0.1.39"
+version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.5"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "num_cpus"
-version = "1.8.0"
+version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.61 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "opaque-debug"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "opaque-debug"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pairing"
 version = "0.14.2"
 dependencies = [
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ff 0.4.0",
  "group 0.1.0",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -397,20 +376,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "proc-macro-hack"
-version = "0.4.0"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro-hack-impl 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack-impl 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "proc-macro-hack-impl"
-version = "0.4.0"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.14"
+version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -418,10 +397,10 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "0.6.8"
+version = "0.6.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -429,19 +408,18 @@ name = "rand"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_chacha 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.61 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_chacha"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -451,7 +429,7 @@ name = "rand_core"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -464,10 +442,10 @@ dependencies = [
 
 [[package]]
 name = "rand_os"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -484,12 +462,12 @@ name = "sapling-crypto"
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- "blake2b_simd 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
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- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "digest 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2b_simd 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2s_simd 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
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- "hex-literal 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -501,23 +479,10 @@ name = "sha2"
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- "block-buffer 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "digest 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-buffer 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
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- "opaque-debug 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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-
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-dependencies = [
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+ "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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 name = "zcash_client_backend"
 version = "0.0.0"
 dependencies = [
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@@ -575,18 +540,18 @@ dependencies = [
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- "crypto_api_chachapoly 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
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- "fpe 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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-"checksum quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)" = "dd636425967c33af890042c483632d33fa7a18f19ad1d7ea72e8998c6ef8dea5"
+"checksum proc-macro-hack 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "463bf29e7f11344e58c9e01f171470ab15c925c6822ad75028cc1c0e1d1eb63b"
+"checksum proc-macro-hack-impl 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "38c47dcb1594802de8c02f3b899e2018c78291168a22c281be21ea0fb4796842"
+"checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
+"checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
 "checksum rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d47eab0e83d9693d40f825f86948aa16eff6750ead4bdffc4ab95b8b3a7f052c"
-"checksum rand_chacha 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e193067942ef6f485a349a113329140d0ab9e2168ce92274499bb0e9a4190d9d"
+"checksum rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "03a2a90da8c7523f554344f921aa97283eadf6ac484a6d2a7d0212fa7f8d6853"
 "checksum rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "615e683324e75af5d43d8f7a39ffe3ee4a9dc42c5c701167a71dc59c3a493aca"
 "checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
-"checksum rand_os 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6e8c83d0434e67e7a92be561af33f3ca17ff9899a4acf28030fabb8c5c323a1a"
+"checksum rand_os 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ddb525a78d3a0b0e05b6fe0f7df14d7a4dc957944c7b403911ba5a0f1c694967"
 "checksum rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "77d416b86801d23dde1aa643023b775c3a462efc0ed96443add11546cdf1dca8"
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-"checksum spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44363f6f51401c34e7be73db0db371c04705d35efbe9f7d6082e03a921a32c55"
-"checksum stream-cipher 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "30dc6118470d69ce0fdcf7e6f95e95853f7f4f72f80d835d4519577c323814ab"
 "checksum syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)" = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
 "checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
diff --git a/pairing/src/bls12_381/ec.rs b/pairing/src/bls12_381/ec.rs
index b20dea8dd..fa659bd58 100644
--- a/pairing/src/bls12_381/ec.rs
+++ b/pairing/src/bls12_381/ec.rs
@@ -955,7 +955,7 @@ pub mod g1 {
                 let negyrepr = negy.into_repr();
 
                 let p = G1Affine {
-                    x: x,
+                    x,
                     y: if yrepr < negyrepr { y } else { negy },
                     infinity: false,
                 };
@@ -1637,7 +1637,7 @@ pub mod g2 {
                 negy.negate();
 
                 let p = G2Affine {
-                    x: x,
+                    x,
                     y: if y < negy { y } else { negy },
                     infinity: false,
                 };
diff --git a/pairing/src/bls12_381/fq12.rs b/pairing/src/bls12_381/fq12.rs
index f07a33784..3c726d2ce 100644
--- a/pairing/src/bls12_381/fq12.rs
+++ b/pairing/src/bls12_381/fq12.rs
@@ -168,8 +168,8 @@ fn test_fq12_mul_by_014() {
         a.mul_by_014(&c0, &c1, &c5);
         b.mul_assign(&Fq12 {
             c0: Fq6 {
-                c0: c0,
-                c1: c1,
+                c0,
+                c1,
                 c2: Fq2::zero(),
             },
             c1: Fq6 {
diff --git a/pairing/src/bls12_381/fq6.rs b/pairing/src/bls12_381/fq6.rs
index 87e64cb0e..dbe58f724 100644
--- a/pairing/src/bls12_381/fq6.rs
+++ b/pairing/src/bls12_381/fq6.rs
@@ -343,7 +343,7 @@ fn test_fq6_mul_by_1() {
         a.mul_by_1(&c1);
         b.mul_assign(&Fq6 {
             c0: Fq2::zero(),
-            c1: c1,
+            c1,
             c2: Fq2::zero(),
         });
 
@@ -366,8 +366,8 @@ fn test_fq6_mul_by_01() {
 
         a.mul_by_01(&c0, &c1);
         b.mul_assign(&Fq6 {
-            c0: c0,
-            c1: c1,
+            c0,
+            c1,
             c2: Fq2::zero(),
         });
 
diff --git a/pairing/src/lib.rs b/pairing/src/lib.rs
index 1c8d90c27..a81d1a136 100644
--- a/pairing/src/lib.rs
+++ b/pairing/src/lib.rs
@@ -2,12 +2,12 @@
 // common mistakes or strange code patterns. If the `cargo-clippy` feature
 // is provided, all compiler warnings are prohibited.
 #![cfg_attr(feature = "cargo-clippy", deny(warnings))]
-#![cfg_attr(feature = "cargo-clippy", allow(inline_always))]
-#![cfg_attr(feature = "cargo-clippy", allow(too_many_arguments))]
-#![cfg_attr(feature = "cargo-clippy", allow(unreadable_literal))]
-#![cfg_attr(feature = "cargo-clippy", allow(many_single_char_names))]
-#![cfg_attr(feature = "cargo-clippy", allow(new_without_default_derive))]
-#![cfg_attr(feature = "cargo-clippy", allow(write_literal))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::inline_always))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::too_many_arguments))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::unreadable_literal))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::many_single_char_names))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::new_without_default))]
+#![cfg_attr(feature = "cargo-clippy", allow(clippy::write_literal))]
 // Force public structures to implement Debug
 #![deny(missing_debug_implementations)]
 
@@ -100,7 +100,7 @@ pub trait Engine: ScalarEngine {
         G2: Into<Self::G2Affine>,
     {
         Self::final_exponentiation(&Self::miller_loop(
-            [(&(p.into().prepare()), &(q.into().prepare()))].into_iter(),
+            [(&(p.into().prepare()), &(q.into().prepare()))].iter(),
         )).unwrap()
     }
 }
diff --git a/sapling-crypto/Cargo.toml b/sapling-crypto/Cargo.toml
index 0026f6c47..c3aedd3ba 100644
--- a/sapling-crypto/Cargo.toml
+++ b/sapling-crypto/Cargo.toml
@@ -18,7 +18,7 @@ blake2b_simd = "0.5"
 blake2s_simd = "0.5"
 ff = { path = "../ff" }
 rand_core = "0.5"
-digest = "0.7"
+digest = "0.8"
 byteorder = "1"
 
 [dev-dependencies]
diff --git a/zcash_client_backend/Cargo.toml b/zcash_client_backend/Cargo.toml
index 1d7848e90..31fba497c 100644
--- a/zcash_client_backend/Cargo.toml
+++ b/zcash_client_backend/Cargo.toml
@@ -7,7 +7,7 @@ authors = [
 edition = "2018"
 
 [dependencies]
-bech32 = "0.6"
+bech32 = "0.7"
 pairing = { path = "../pairing" }
 sapling-crypto = { path = "../sapling-crypto" }
 zcash_primitives = { path = "../zcash_primitives" }
diff --git a/zcash_client_backend/src/encoding.rs b/zcash_client_backend/src/encoding.rs
index d8162017b..0c0a50bcb 100644
--- a/zcash_client_backend/src/encoding.rs
+++ b/zcash_client_backend/src/encoding.rs
@@ -3,7 +3,7 @@
 //! Human-Readable Prefixes (HRPs) for Bech32 encodings are located in the [`constants`]
 //! module.
 
-use bech32::{convert_bits, Bech32, Error};
+use bech32::{self, Error, FromBase32, ToBase32};
 use pairing::bls12_381::Bls12;
 use sapling_crypto::{
     jubjub::edwards,
@@ -21,21 +21,16 @@ where
 {
     let mut data: Vec<u8> = vec![];
     write(&mut data).expect("Should be able to write to a Vec");
-
-    let converted =
-        convert_bits(&data, 8, 5, true).expect("Should be able to convert Vec<u8> to Vec<u5>");
-    let encoded = Bech32::new_check_data(hrp.into(), converted).expect("hrp is not empty");
-
-    encoded.to_string()
+    bech32::encode(hrp, data.to_base32()).expect("hrp is invalid")
 }
 
 fn bech32_decode<T, F>(hrp: &str, s: &str, read: F) -> Result<Option<T>, Error>
 where
     F: Fn(Vec<u8>) -> Option<T>,
 {
-    let decoded = s.parse::<Bech32>()?;
-    if decoded.hrp() == hrp {
-        convert_bits(decoded.data(), 5, 8, false).map(|data| read(data))
+    let (decoded_hrp, data) = bech32::decode(s)?;
+    if decoded_hrp == hrp {
+        Vec::<u8>::from_base32(&data).map(|data| read(data))
     } else {
         Ok(None)
     }
diff --git a/zcash_primitives/Cargo.toml b/zcash_primitives/Cargo.toml
index 804f8c6d9..ba724be1c 100644
--- a/zcash_primitives/Cargo.toml
+++ b/zcash_primitives/Cargo.toml
@@ -6,12 +6,12 @@ authors = [
 ]
 
 [dependencies]
-aes = "0.2"
+aes = "0.3"
 blake2b_simd = "0.5"
 byteorder = "1"
-crypto_api_chachapoly = "0.1"
+crypto_api_chachapoly = "0.2.1"
 ff = { path = "../ff" }
-fpe = "0.1"
+fpe = "0.2"
 hex = "0.3"
 lazy_static = "1"
 pairing = { path = "../pairing" }
diff --git a/zcash_primitives/src/note_encryption.rs b/zcash_primitives/src/note_encryption.rs
index 42e139804..d6b66ce8a 100644
--- a/zcash_primitives/src/note_encryption.rs
+++ b/zcash_primitives/src/note_encryption.rs
@@ -444,23 +444,12 @@ pub fn try_sapling_compact_note_decryption(
     let shared_secret = sapling_ka_agree(ivk, epk);
     let key = kdf_sapling(shared_secret, &epk);
 
-    // Prefix plaintext with 64 zero-bytes to skip over Poly1305 keying output
-    const CHACHA20_BLOCK_SIZE: usize = 64;
-    let mut plaintext = [0; CHACHA20_BLOCK_SIZE + COMPACT_NOTE_SIZE];
-    plaintext[CHACHA20_BLOCK_SIZE..].copy_from_slice(&enc_ciphertext[0..COMPACT_NOTE_SIZE]);
-    assert_eq!(
-        ChaCha20Ietf::cipher()
-            .decrypt(
-                &mut plaintext,
-                CHACHA20_BLOCK_SIZE + COMPACT_NOTE_SIZE,
-                key.as_bytes(),
-                &[0u8; 12],
-            )
-            .ok()?,
-        CHACHA20_BLOCK_SIZE + COMPACT_NOTE_SIZE
-    );
+    // Start from block 1 to skip over Poly1305 keying output
+    let mut plaintext = [0; COMPACT_NOTE_SIZE];
+    plaintext.copy_from_slice(&enc_ciphertext);
+    ChaCha20Ietf::xor(key.as_bytes(), &[0u8; 12], 1, &mut plaintext);
 
-    parse_note_plaintext_without_memo(ivk, cmu, &plaintext[CHACHA20_BLOCK_SIZE..])
+    parse_note_plaintext_without_memo(ivk, cmu, &plaintext)
 }
 
 /// Recovery of the full note plaintext by the sender.