diff --git a/Cargo.lock b/Cargo.lock
index 05fb49b..0fd98ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -344,15 +344,26 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "wasmparser"
+version = "0.256.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60bd825ffedc6cba8a642924ba7ae424afbc47811cffbcb7b92031ec24e59b4c"
+dependencies = [
+ "bitflags",
+ "indexmap",
+ "semver",
+]
+
 [[package]]
 name = "wasmprinter"
-version = "0.255.0"
+version = "0.256.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6765bb702ec2a3e84c228c0343d179f32bd0c7326d710d83c80cff6ecce987ae"
+checksum = "86e15994b4797b3826dc466488a9019975fda659a9746d28c29b9a09fc02c8ea"
 dependencies = [
  "anyhow",
  "termcolor",
- "wasmparser 0.255.0",
+ "wasmparser 0.256.0",
 ]
 
 [[package]]
diff --git a/crates/typed-wasm-codegen/Cargo.toml b/crates/typed-wasm-codegen/Cargo.toml
index 2ad8558..cfb5323 100644
--- a/crates/typed-wasm-codegen/Cargo.toml
+++ b/crates/typed-wasm-codegen/Cargo.toml
@@ -21,7 +21,7 @@ path = "src/bin/tw.rs"
 # and verifier on the same locked version.
 wasm-encoder = "=0.255.0"
 # WAT (text wasm) rendering for `tw build --emit wat` (Phase 1 deliverable 4, #125).
-wasmprinter = "=0.255.0"
+wasmprinter = "=0.256.0"
 # The producer reuses the verifier's own carrier encoders so the emitted
 # typedwasm.regions / typedwasm.access-sites bytes cannot drift from the
 # decoder the verifier runs. `unstable-l2` gates those encoders.