diff --git a/Cargo.lock b/Cargo.lock
index a4cf323c..2aa74b0b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1861,9 +1861,9 @@ dependencies = [
 
 [[package]]
 name = "serial_test"
-version = "3.5.0"
+version = "4.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "699f4197115b8a7e7ff19c9a315a4bd6fffec26cc4626ef45ecaea389e081c6d"
+checksum = "a6df5ed973ad8d834e09f824f9e9f449af6b9a3745f78dec7cc752770bd3bf11"
 dependencies = [
  "futures-executor",
  "futures-util",
@@ -1875,13 +1875,13 @@ dependencies = [
 
 [[package]]
 name = "serial_test_derive"
-version = "3.5.0"
+version = "4.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94e153fc76e1c6a068703d6d29c508a0b15c061c4b7e43da59cc097bc342673c"
+checksum = "a22144e767da4ddd8416dbf383700542ffd8a5dc493dfecedfe1fe3ad03c98ae"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.119",
+ "syn 3.0.3",
 ]
 
 [[package]]
diff --git a/crates/aptu-coder/Cargo.toml b/crates/aptu-coder/Cargo.toml
index b889b553..eab9ce20 100644
--- a/crates/aptu-coder/Cargo.toml
+++ b/crates/aptu-coder/Cargo.toml
@@ -48,6 +48,6 @@ base64 = { workspace = true }
 [dev-dependencies]
 tokio = { workspace = true }
 tempfile = { workspace = true }
-serial_test = "=3.5.0"
+serial_test = "=4.0.1"
 tower = { version = "=0.5.3", features = ["util"] }
 rmcp = { workspace = true, features = ["client"] }