diff --git a/.github/workflows/static_analysis.yaml b/.github/workflows/static_analysis.yaml
index 94ed2c7488..204d3c46f4 100644
--- a/.github/workflows/static_analysis.yaml
+++ b/.github/workflows/static_analysis.yaml
@@ -36,7 +36,7 @@ jobs:
             - name: Switch js-sdk to release mode
               working-directory: node_modules/matrix-js-sdk
               run: |
-                  scripts/switch_package_to_release.js
+                  scripts/switch_package_to_release.cjs
                   yarn install
                   yarn run build:compile
                   yarn run build:types
diff --git a/.prettierrc.js b/.prettierrc.cjs
similarity index 100%
rename from .prettierrc.js
rename to .prettierrc.cjs