diff --git a/.github/workflows/perf.yml b/.github/workflows/perf.yml
index f0e7e0c..e5ce39a 100644
--- a/.github/workflows/perf.yml
+++ b/.github/workflows/perf.yml
@@ -13,7 +13,7 @@ jobs:
     env:
       DFX_VERSION: 0.24.0
       IC_REPL_VERSION: 0.7.5
-      MOC_VERSION: 0.13.0
+      MOC_VERSION: 0.12.1
       IC_WASM_VERSION: 0.7.0
       RUSTC_VERSION: 1.76.0
     steps: