diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 5e8a8e0e..dcd0ccec 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -29,7 +29,7 @@ jobs:
         # uses: denoland/setup-deno@v1
         uses: denoland/setup-deno@004814556e37c54a2f6e31384c9e18e983317366
         with:
-          deno-version: vx.x.x
+          deno-version: "1.39.1"
 
       # Uncomment this step to verify the use of 'deno fmt' on each commit.
       # - name: Verify formatting