diff --git a/Cargo.lock b/Cargo.lock
index 6f31b1f2e..abd9e1d99 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6382,7 +6382,7 @@ dependencies = [
 
 [[package]]
 name = "zcash_primitives"
-version = "0.20.0"
+version = "0.21.0"
 dependencies = [
  "aes",
  "assert_matches",
diff --git a/Cargo.toml b/Cargo.toml
index fc49c01f0..fafd9b204 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,7 +42,7 @@ zcash_protocol = { version = "0.4.1", path = "components/zcash_protocol", defaul
 zip321 = { version = "0.2", path = "components/zip321" }
 
 zcash_note_encryption = "0.4.1"
-zcash_primitives = { version = "0.20", path = "zcash_primitives", default-features = false }
+zcash_primitives = { version = "0.21", path = "zcash_primitives", default-features = false }
 zcash_proofs = { version = "0.20", path = "zcash_proofs", default-features = false }
 
 pczt = { version = "0.0", path = "pczt" }
diff --git a/zcash_client_backend/CHANGELOG.md b/zcash_client_backend/CHANGELOG.md
index 646c9c14e..bbb326adf 100644
--- a/zcash_client_backend/CHANGELOG.md
+++ b/zcash_client_backend/CHANGELOG.md
@@ -16,7 +16,7 @@ and this library adheres to Rust's notion of
   - `wallet::extract_and_store_transaction_from_pczt`
 
 ### Changed
-- Migrated to `sapling-crypto` version `0.4`, `zcash_keys` version `0.6`.
+- Migrated to `sapling-crypto 0.4`, `zcash_keys 0.6`, `zcash_primitives 0.21`.
 - `zcash_client_backend::data_api::AccountBalance`: Refactored to use `Balance`
   for transparent funds (issue #1411). It now has an `unshielded_balance()`
   method that returns `Balance`, allowing the unshielded spendable, unshielded
diff --git a/zcash_client_sqlite/CHANGELOG.md b/zcash_client_sqlite/CHANGELOG.md
index e199e2a23..5e4d4ff27 100644
--- a/zcash_client_sqlite/CHANGELOG.md
+++ b/zcash_client_sqlite/CHANGELOG.md
@@ -11,7 +11,7 @@ and this library adheres to Rust's notion of
 - `zcash_client_sqlite::AccountUuid`
 
 ### Changed
-- Migrated to `sapling-crypto` version `0.4`, `zcash_keys` version `0.6`.
+- Migrated to `sapling-crypto 0.4`, `zcash_keys 0.6`, `zcash_primitives 0.21`.
 - The `v_transactions` view has been modified:
   - The `account_id` column has been replaced with `account_uuid`.
 - The `v_tx_outputs` view has been modified:
diff --git a/zcash_primitives/CHANGELOG.md b/zcash_primitives/CHANGELOG.md
index 724de4209..fc811d14e 100644
--- a/zcash_primitives/CHANGELOG.md
+++ b/zcash_primitives/CHANGELOG.md
@@ -7,6 +7,8 @@ and this library adheres to Rust's notion of
 
 ## [Unreleased]
 
+## [0.21.0] - 2024-12-16
+
 ### Added
 - `zcash_primitives::legacy::Script::address`
 - `zcash_primitives::transaction`
diff --git a/zcash_primitives/Cargo.toml b/zcash_primitives/Cargo.toml
index f325d6ac4..bf207a150 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 = "0.20.0"
+version = "0.21.0"
 authors = [
     "Jack Grigg <jack@z.cash>",
     "Kris Nuttycombe <kris@electriccoin.co>"
diff --git a/zcash_proofs/CHANGELOG.md b/zcash_proofs/CHANGELOG.md
index c614dafa9..5e7c64117 100644
--- a/zcash_proofs/CHANGELOG.md
+++ b/zcash_proofs/CHANGELOG.md
@@ -7,11 +7,12 @@ and this library adheres to Rust's notion of
 
 ## [Unreleased]
 
+## [0.21.0] - 2024-12-16
 ### Added
 - `zcash_proofs::prover::LocalTxProver::verifying_keys`
 
 ### Changed
-- Migrated to `sapling-crypto` version `0.4`.
+- Migrated to `sapling-crypto` version `0.4`, `zcash_primitives 0.21`.
 
 ## [0.20.0] - 2024-11-14