diff --git a/Cargo.lock b/Cargo.lock
index 22cdedf89..420ae4de5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,33 +2,32 @@
 # It is not intended for manual editing.
 [[package]]
 name = "aes"
-version = "0.5.0"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd2bc6d3f370b5666245ff421e231cba4353df936e26986d2918e61a8fd6aef6"
+checksum = "884391ef1066acaa41e766ba8f596341b96e93ce34f9a43e7d24bf0a0eaf0561"
 dependencies = [
  "aes-soft",
  "aesni",
- "block-cipher",
+ "cipher",
 ]
 
 [[package]]
 name = "aes-soft"
-version = "0.5.0"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63dd91889c49327ad7ef3b500fd1109dbd3c509a03db0d4a9ce413b79f575cb6"
+checksum = "be14c7498ea50828a38d0e24a765ed2effe92a705885b57d029cd67d45744072"
 dependencies = [
- "block-cipher",
- "byteorder",
+ "cipher",
  "opaque-debug",
 ]
 
 [[package]]
 name = "aesni"
-version = "0.8.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a6fe808308bb07d393e2ea47780043ec47683fcf19cf5efc8ca51c50cc8c68a"
+checksum = "ea2e11f5e94c2f7d386164cc2aa1f97823fed6f259e486940a71c174dd01b0ce"
 dependencies = [
- "block-cipher",
+ "cipher",
  "opaque-debug",
 ]
 
@@ -137,23 +136,14 @@ dependencies = [
  "generic-array",
 ]
 
-[[package]]
-name = "block-cipher"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f337a3e6da609650eb74e02bc9fac7b735049f7623ab12f2e4c719316fcc7e80"
-dependencies = [
- "generic-array",
-]
-
 [[package]]
 name = "block-modes"
-version = "0.6.1"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c9b14fd8a4739e6548d4b6018696cf991dcf8c6effd9ef9eb33b29b8a650972"
+checksum = "57a0e8073e8baa88212fb5823574c02ebccb395136ba9a164ab89379ec6072f0"
 dependencies = [
- "block-cipher",
  "block-padding",
+ "cipher",
 ]
 
 [[package]]
@@ -207,6 +197,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12f8e7987cbd042a63249497f41aed09f8e65add917ea6566effbc56578d6801"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
@@ -412,9 +411,9 @@ dependencies = [
 
 [[package]]
 name = "fpe"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef2196a22f6d98bbde79ae510eb4f397bd446cfbd6c26425e25ec81442a31bab"
+checksum = "a25080721bbcd2cd4d765b7d607ea350425fa087ce53cd3e31afcacdab850352"
 dependencies = [
  "aes",
  "block-modes",
@@ -1005,9 +1004,9 @@ dependencies = [
 
 [[package]]
 name = "zcash_primitives"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45ab71b5765cb89a423e3a2f0de596dc8e581bf5bbf9d933bc8c22833886d13c"
+checksum = "926666fae42e08d65ddba7c3808873d1e6cd6e7dd86e84f51a909c79b5fe285c"
 dependencies = [
  "aes",
  "bitvec",
@@ -1019,6 +1018,7 @@ dependencies = [
  "equihash",
  "ff",
  "fpe",
+ "funty",
  "group",
  "hex",
  "jubjub",
@@ -1032,9 +1032,9 @@ dependencies = [
 
 [[package]]
 name = "zcash_proofs"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "902845afb8636c4f88c0fd2a8bf338b645474488cb60676194fbf7713a3b9cc0"
+checksum = "bc3cd16a4efbebf925756f339d01e876816d37d1f458bd8243edb3bd8dbad74b"
 dependencies = [
  "bellman",
  "blake2b_simd",
diff --git a/Cargo.toml b/Cargo.toml
index 5a007093d..7286fdb4d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,8 +33,8 @@ tracing = "0.1"
 tracing-core = "0.1"
 tracing-appender = "0.1"
 zcash_history = "0.2"
-zcash_primitives = "0.4"
-zcash_proofs = "0.4"
+zcash_primitives = "0.5"
+zcash_proofs = "0.5"
 ed25519-zebra = "2.0.0"
 
 # Temporary workaround for https://github.com/myrrlyn/funty/issues/3
diff --git a/src/rust/src/rustzcash.rs b/src/rust/src/rustzcash.rs
index 6108b3882..677011a6b 100644
--- a/src/rust/src/rustzcash.rs
+++ b/src/rust/src/rustzcash.rs
@@ -145,19 +145,18 @@ pub extern "C" fn librustzcash_init_zksnark_params(
     );
 
     // Load params
-    let (spend_params, spend_vk, output_params, output_vk, sprout_vk) =
-        load_parameters(spend_path, output_path, sprout_path);
+    let params = load_parameters(spend_path, output_path, sprout_path);
 
     // Caller is responsible for calling this function once, so
     // these global mutations are safe.
     unsafe {
-        SAPLING_SPEND_PARAMS = Some(spend_params);
-        SAPLING_OUTPUT_PARAMS = Some(output_params);
+        SAPLING_SPEND_PARAMS = Some(params.spend_params);
+        SAPLING_OUTPUT_PARAMS = Some(params.output_params);
         SPROUT_GROTH16_PARAMS_PATH = sprout_path.map(|p| p.to_owned());
 
-        SAPLING_SPEND_VK = Some(spend_vk);
-        SAPLING_OUTPUT_VK = Some(output_vk);
-        SPROUT_GROTH16_VK = sprout_vk;
+        SAPLING_SPEND_VK = Some(params.spend_vk);
+        SAPLING_OUTPUT_VK = Some(params.output_vk);
+        SPROUT_GROTH16_VK = params.sprout_vk;
     }
 }
 
@@ -386,7 +385,7 @@ pub extern "C" fn librustzcash_sapling_compute_nf(
     let vk = ViewingKey { ak, nk };
     let nf = note.nf(&vk, position);
     let result = unsafe { &mut *result };
-    result.copy_from_slice(&nf);
+    result.copy_from_slice(&nf.0);
 
     true
 }
diff --git a/src/rust/src/tests/key_agreement.rs b/src/rust/src/tests/key_agreement.rs
index 1f7b5a503..3b326e98a 100644
--- a/src/rust/src/tests/key_agreement.rs
+++ b/src/rust/src/tests/key_agreement.rs
@@ -29,7 +29,7 @@ fn test_key_agreement() {
 
     // Grab ivk from our viewing key in serialized form
     let ivk = vk.ivk();
-    let ivk_serialized = ivk.to_bytes();
+    let ivk_serialized = ivk.to_repr();
 
     // Create random esk
     let mut esk = [0u8; 32];
diff --git a/src/rust/src/tests/key_components.rs b/src/rust/src/tests/key_components.rs
index 7a2147340..715df7b2f 100644
--- a/src/rust/src/tests/key_components.rs
+++ b/src/rust/src/tests/key_components.rs
@@ -1,7 +1,7 @@
 use group::GroupEncoding;
 use zcash_primitives::{
     constants::SPENDING_KEY_GENERATOR,
-    primitives::{Diversifier, ProofGenerationKey, Rseed},
+    primitives::{Diversifier, Nullifier, ProofGenerationKey, Rseed},
 };
 
 use crate::{
@@ -674,7 +674,7 @@ fn key_components() {
             assert_eq!(&nk, &tv.nk);
         }
 
-        assert_eq!(&fvk.ivk().to_bytes(), &tv.ivk);
+        assert_eq!(&fvk.ivk().to_repr(), &tv.ivk);
         {
             let mut ivk = [0u8; 32];
             librustzcash_crh_ivk(&tv.ak, &tv.nk, &mut ivk);
@@ -698,6 +698,6 @@ fn key_components() {
             .unwrap();
         assert_eq!(&note.cmu().to_bytes(), &tv.note_cm);
 
-        assert_eq!(note.nf(&fvk, tv.note_pos), tv.note_nf);
+        assert_eq!(note.nf(&fvk, tv.note_pos), Nullifier(tv.note_nf));
     }
 }