diff --git a/polkadot/runtime/rococo/Cargo.toml b/polkadot/runtime/rococo/Cargo.toml
index e8817ec04e1f8..cdca48ebd3dab 100644
--- a/polkadot/runtime/rococo/Cargo.toml
+++ b/polkadot/runtime/rococo/Cargo.toml
@@ -11,7 +11,7 @@ license.workspace = true
 workspace = true
 
 [dependencies]
-parity-scale-codec = { version = "3.6.1", default-features = false, features = [
+parity-scale-codec = { version = "3.6.12", default-features = false, features = [
 	"derive",
 	"max-encoded-len",
 ] }
diff --git a/polkadot/runtime/westend/Cargo.toml b/polkadot/runtime/westend/Cargo.toml
index 734e16ca9622f..b29820308c12f 100644
--- a/polkadot/runtime/westend/Cargo.toml
+++ b/polkadot/runtime/westend/Cargo.toml
@@ -12,7 +12,7 @@ workspace = true
 
 [dependencies]
 bitvec = { version = "1.0.0", default-features = false, features = ["alloc"] }
-parity-scale-codec = { version = "3.6.1", default-features = false, features = [
+parity-scale-codec = { version = "3.6.12", default-features = false, features = [
 	"derive",
 	"max-encoded-len",
 ] }