diff --git a/.devcontainer/cpp/apt-requirements-clang.json b/.devcontainer/cpp/apt-requirements-clang.json
index ab012de7..6ed14786 100644
--- a/.devcontainer/cpp/apt-requirements-clang.json
+++ b/.devcontainer/cpp/apt-requirements-clang.json
@@ -7,5 +7,5 @@
   "libclang-rt-20-dev": "1:20.1.8-2ubuntu8",
   "lld-20": "1:20.1.8-2ubuntu8",
   "llvm-20": "1:20.1.8-2ubuntu8",
-  "mull-20": "0.33.0"
+  "mull-20": "0.34.0"
 }