diff --git a/.github/workflows/viewerjs-check.yml b/.github/workflows/viewerjs-check.yml
index 6f0118d..4dc9411 100644
--- a/.github/workflows/viewerjs-check.yml
+++ b/.github/workflows/viewerjs-check.yml
@@ -13,7 +13,7 @@ permissions:
 jobs:
   viewerjs:
     runs-on: ubuntu-latest
-    timeout-minutes: 25
+    timeout-minutes: 40
     steps:
       - uses: actions/checkout@v7
       - uses: actions/setup-python@v7