diff --git a/.github/workflows/webassembly.yml b/.github/workflows/webassembly.yml
index 320effc12..3c4f2a8d4 100644
--- a/.github/workflows/webassembly.yml
+++ b/.github/workflows/webassembly.yml
@@ -15,7 +15,7 @@ jobs:
         rust:
           - stable
           - beta
-          - nightly
+          - nightly-2025-12-09
         target:
           - wasm32-unknown-emscripten
           - wasm32-unknown-unknown