diff --git a/Cargo.lock b/Cargo.lock
index 2c2362ca..268023d6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2006,9 +2006,9 @@ dependencies = [
 
 [[package]]
 name = "primitive-types"
-version = "0.7.2"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c55c21c64d0eaa4d7ed885d959ef2d62d9e488c27c0e02d9aa5ce6c877b7d5f8"
+checksum = "7dd39dcacf71411ba488570da7bbc89b717225e46478b30ba99b92db6b149809"
 dependencies = [
  "fixed-hash",
  "impl-codec",
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index 93efc7bc..54953858 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -24,7 +24,7 @@ futures = "0.3"
 hex = "0.4"
 jubjub = "0.5.1"
 lazy_static = "1.4.0"
-primitive-types = "0.7.2"
+primitive-types = "0.7.3"
 rand_core = "0.5.1"
 ripemd160 = "0.8.0"
 secp256k1 = { version = "0.19.0", features = ["serde"] }
diff --git a/zebra-state/Cargo.toml b/zebra-state/Cargo.toml
index 06a21f29..ab5bf229 100644
--- a/zebra-state/Cargo.toml
+++ b/zebra-state/Cargo.toml
@@ -35,4 +35,4 @@ spandoc = "0.2"
 tempdir = "0.3.7"
 tokio = { version = "0.2.22", features = ["full"] }
 proptest = "0.10.1"
-primitive-types = "0.7.2"
+primitive-types = "0.7.3"