diff --git a/Cargo.lock b/Cargo.lock
index 37967cf2a..735a2855f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -67,19 +67,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bellman"
-version = "0.2.0"
+version = "0.6.0"
 dependencies = [
  "bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake2s_simd 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.5.2",
+ "ff 0.6.0",
  "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "group 0.2.0",
+ "group 0.6.0",
  "hex-literal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.15.1",
+ "pairing 0.16.0",
  "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -305,16 +305,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "ff"
-version = "0.5.2"
+version = "0.6.0"
 dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff_derive 0.4.1",
+ "ff_derive 0.6.0",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "ff_derive"
-version = "0.4.1"
+version = "0.6.0"
 dependencies = [
  "num-bigint 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -375,9 +375,9 @@ dependencies = [
 
 [[package]]
 name = "group"
-version = "0.2.0"
+version = "0.6.0"
 dependencies = [
- "ff 0.5.2",
+ "ff 0.6.0",
  "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -418,17 +418,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "librustzcash"
 version = "0.2.0"
 dependencies = [
- "bellman 0.2.0",
+ "bellman 0.6.0",
  "blake2b_simd 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake2s_simd 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.5.2",
+ "ff 0.6.0",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.15.1",
+ "pairing 0.16.0",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "zcash_history 0.0.1",
- "zcash_primitives 0.1.0",
- "zcash_proofs 0.1.0",
+ "zcash_history 0.2.0",
+ "zcash_primitives 0.2.0",
+ "zcash_proofs 0.2.0",
 ]
 
 [[package]]
@@ -499,11 +499,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pairing"
-version = "0.15.1"
+version = "0.16.0"
 dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.5.2",
- "group 0.2.0",
+ "ff 0.6.0",
+ "group 0.6.0",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -851,23 +851,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "zcash_client_backend"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "bech32 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.5.2",
+ "ff 0.6.0",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.15.1",
+ "pairing 0.16.0",
  "protobuf 2.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "protobuf-codegen-pure 2.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "subtle 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "zcash_primitives 0.1.0",
+ "zcash_primitives 0.2.0",
 ]
 
 [[package]]
 name = "zcash_history"
-version = "0.0.1"
+version = "0.2.0"
 dependencies = [
  "assert_matches 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bigint 4.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -878,20 +878,20 @@ dependencies = [
 
 [[package]]
 name = "zcash_primitives"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "aes 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake2b_simd 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake2s_simd 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "crypto_api_chachapoly 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.5.2",
+ "ff 0.6.0",
  "fpe 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex-literal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.15.1",
+ "pairing 0.16.0",
  "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -902,17 +902,17 @@ dependencies = [
 
 [[package]]
 name = "zcash_proofs"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
- "bellman 0.2.0",
+ "bellman 0.6.0",
  "blake2b_simd 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "directories 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.5.2",
- "pairing 0.15.1",
+ "ff 0.6.0",
+ "pairing 0.16.0",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "zcash_primitives 0.1.0",
+ "zcash_primitives 0.2.0",
 ]
 
 [metadata]
diff --git a/bellman/Cargo.toml b/bellman/Cargo.toml
index 3acc8c424..f329609f0 100644
--- a/bellman/Cargo.toml
+++ b/bellman/Cargo.toml
@@ -6,19 +6,19 @@ homepage = "https://github.com/ebfull/bellman"
 license = "MIT/Apache-2.0"
 name = "bellman"
 repository = "https://github.com/ebfull/bellman"
-version = "0.2.0"
+version = "0.6.0"
 edition = "2018"
 
 [dependencies]
 bit-vec = "0.4.4"
 blake2s_simd = "0.5"
-ff = { version = "0.5.0", path = "../ff" }
+ff = { version = "0.6", path = "../ff" }
 futures = "0.1"
 futures-cpupool = { version = "0.1", optional = true }
-group = { version = "0.2.0", path = "../group" }
+group = { version = "0.6", path = "../group" }
 num_cpus = { version = "1", optional = true }
 crossbeam = { version = "0.7", optional = true }
-pairing = { version = "0.15.0", path = "../pairing", optional = true }
+pairing = { version = "0.16", path = "../pairing", optional = true }
 rand_core = "0.5"
 byteorder = "1"
 
diff --git a/ff/Cargo.toml b/ff/Cargo.toml
index 94480b04c..e1cf5e3b4 100644
--- a/ff/Cargo.toml
+++ b/ff/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ff"
-version = "0.5.2"
+version = "0.6.0"
 authors = ["Sean Bowe <ewillbefull@gmail.com>"]
 description = "Library for building and interfacing with finite fields"
 readme = "README.md"
@@ -12,7 +12,7 @@ edition = "2018"
 
 [dependencies]
 byteorder = "1"
-ff_derive = { version = "^0.4.1", path = "ff_derive", optional = true }
+ff_derive = { version = "0.6", path = "ff_derive", optional = true }
 rand_core = "0.5"
 
 [features]
diff --git a/ff/ff_derive/Cargo.toml b/ff/ff_derive/Cargo.toml
index 04a9bc23c..8c28a1350 100644
--- a/ff/ff_derive/Cargo.toml
+++ b/ff/ff_derive/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ff_derive"
-version = "0.4.1"
+version = "0.6.0"
 authors = ["Sean Bowe <ewillbefull@gmail.com>"]
 description = "Procedural macro library used to build custom prime field implementations"
 documentation = "https://docs.rs/ff/"
diff --git a/group/Cargo.toml b/group/Cargo.toml
index 03c172f9d..9b8fe5f76 100644
--- a/group/Cargo.toml
+++ b/group/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "group"
-version = "0.2.0"
+version = "0.6.0"
 authors = [
     "Sean Bowe <ewillbefull@gmail.com>",
     "Jack Grigg <jack@z.cash>",
@@ -15,7 +15,7 @@ repository = "https://github.com/ebfull/group"
 edition = "2018"
 
 [dependencies]
-ff = { version = "0.5.0", path = "../ff" }
+ff = { version = "0.6", path = "../ff" }
 rand = "0.7"
 rand_xorshift = "0.2"
 
diff --git a/librustzcash/Cargo.toml b/librustzcash/Cargo.toml
index 304dbdfec..4a2bfb706 100644
--- a/librustzcash/Cargo.toml
+++ b/librustzcash/Cargo.toml
@@ -20,17 +20,17 @@ path = "src/rustzcash.rs"
 crate-type = ["staticlib"]
 
 [dependencies]
-bellman = { version = "0.2.0", path = "../bellman" }
+bellman = { version = "0.6", path = "../bellman" }
 blake2b_simd = "0.5"
 blake2s_simd = "0.5"
-ff = { version = "0.5.0", path = "../ff" }
+ff = { version = "0.6", path = "../ff" }
 libc = "0.2"
-pairing = { version = "0.15.0", path = "../pairing" }
+pairing = { version = "0.16", path = "../pairing" }
 lazy_static = "1"
 rand_core = "0.5.1"
-zcash_history = { version = "0.0.1", path = "../zcash_history" }
-zcash_primitives = { version = "0.1.0", path = "../zcash_primitives" }
-zcash_proofs = { version = "0.1.0", path = "../zcash_proofs" }
+zcash_history = { version = "0.2", path = "../zcash_history" }
+zcash_primitives = { version = "0.2", path = "../zcash_primitives" }
+zcash_proofs = { version = "0.2", path = "../zcash_proofs" }
 
 [badges]
 maintenance = { status = "deprecated" }
diff --git a/pairing/Cargo.toml b/pairing/Cargo.toml
index d46fad7a2..daf60188e 100644
--- a/pairing/Cargo.toml
+++ b/pairing/Cargo.toml
@@ -2,7 +2,7 @@
 name = "pairing"
 
 # Remember to change version string in README.md.
-version = "0.15.1"
+version = "0.16.0"
 authors = [
     "Sean Bowe <ewillbefull@gmail.com>",
     "Jack Grigg <jack@z.cash>",
@@ -18,8 +18,8 @@ edition ="2018"
 
 [dependencies]
 byteorder = "1"
-ff = { version = "^0.5.2", path = "../ff", features = ["derive"] }
-group = { version = "0.2.0", path = "../group" }
+ff = { version = "0.6", path = "../ff", features = ["derive"] }
+group = { version = "0.6", path = "../group" }
 rand_core = "0.5"
 
 [dev-dependencies]
diff --git a/zcash_client_backend/Cargo.toml b/zcash_client_backend/Cargo.toml
index 3e472fd30..562d1a50e 100644
--- a/zcash_client_backend/Cargo.toml
+++ b/zcash_client_backend/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "zcash_client_backend"
 description = "APIs for creating shielded Zcash light clients"
-version = "0.1.0"
+version = "0.2.0"
 authors = [
     "Jack Grigg <jack@z.cash>",
 ]
@@ -13,12 +13,12 @@ edition = "2018"
 
 [dependencies]
 bech32 = "0.7"
-ff = { version = "0.5.0", path = "../ff" }
+ff = { version = "0.6", path = "../ff" }
 hex = "0.3"
-pairing = { version = "0.15.0", path = "../pairing" }
+pairing = { version = "0.16", path = "../pairing" }
 protobuf = "2"
 subtle = "2"
-zcash_primitives = { version = "0.1.0", path = "../zcash_primitives" }
+zcash_primitives = { version = "0.2", path = "../zcash_primitives" }
 
 [build-dependencies]
 protobuf-codegen-pure = "2"
diff --git a/zcash_history/Cargo.toml b/zcash_history/Cargo.toml
index ee91d3a10..8f254e28e 100644
--- a/zcash_history/Cargo.toml
+++ b/zcash_history/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zcash_history"
-version = "0.0.1"
+version = "0.2.0"
 authors = ["NikVolf <nikvolf@gmail.com>"]
 edition = "2018"
 license = "MIT/Apache-2.0"
diff --git a/zcash_primitives/Cargo.toml b/zcash_primitives/Cargo.toml
index 4766c7a4a..d3fab13c9 100644
--- a/zcash_primitives/Cargo.toml
+++ b/zcash_primitives/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "zcash_primitives"
 description = "Rust implementations of the Zcash primitives"
-version = "0.1.0"
+version = "0.2.0"
 authors = [
     "Jack Grigg <jack@z.cash>",
 ]
@@ -17,12 +17,12 @@ blake2b_simd = "0.5"
 blake2s_simd = "0.5"
 byteorder = "1"
 crypto_api_chachapoly = "0.2.1"
-ff = { version = "0.5.0", path = "../ff" }
+ff = { version = "0.6", path = "../ff" }
 fpe = "0.2"
 hex = "0.3"
 lazy_static = "1"
 log = "0.4"
-pairing = { version = "0.15.0", path = "../pairing" }
+pairing = { version = "0.16", path = "../pairing" }
 rand = "0.7"
 rand_core = "0.5.1"
 ripemd160 = { version = "0.8", optional = true }
diff --git a/zcash_proofs/Cargo.toml b/zcash_proofs/Cargo.toml
index a88798407..3d2a8d4be 100644
--- a/zcash_proofs/Cargo.toml
+++ b/zcash_proofs/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "zcash_proofs"
 description = "Zcash zk-SNARK circuits and proving APIs"
-version = "0.1.0"
+version = "0.2.0"
 authors = [
     "Jack Grigg <jack@z.cash>",
 ]
@@ -12,14 +12,14 @@ license = "MIT OR Apache-2.0"
 edition = "2018"
 
 [dependencies]
-bellman = { version = "0.2.0", path = "../bellman", default-features = false, features = ["groth16"] }
+bellman = { version = "0.6", path = "../bellman", default-features = false, features = ["groth16"] }
 blake2b_simd = "0.5"
 byteorder = "1"
 directories = { version = "1", optional = true }
-ff = { version = "0.5.0", path = "../ff" }
-pairing = { version = "0.15.0", path = "../pairing" }
+ff = { version = "0.6", path = "../ff" }
+pairing = { version = "0.16", path = "../pairing" }
 rand_core = "0.5.1"
-zcash_primitives = { version = "0.1.0", path = "../zcash_primitives" }
+zcash_primitives = { version = "0.2", path = "../zcash_primitives" }
 
 [dev-dependencies]
 rand_xorshift = "0.2"