diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c6493ef..ef215d4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -113,7 +113,7 @@ jobs:
     # we need in addition to the standard UCRT paths, /c/ProgramData/chocolatey/bin and
     # /c/windows/system32.
     # See https://github.com/msys2/setup-msys2
-    - uses: msys2/setup-msys2@v2
+    - uses: msys2/setup-msys2@v2.31.0
       with:
         msystem: UCRT64
         update: true
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 5658d18..8bc1797 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -145,7 +145,7 @@ jobs:
 
     # We need path-type of inherit to include the protoc compiler on the $PATH.
     # See https://github.com/msys2/setup-msys2
-    - uses: msys2/setup-msys2@v2
+    - uses: msys2/setup-msys2@v2.31.0
       with:
         msystem: UCRT64
         update: true