diff --git a/entrypoint.sh b/entrypoint.sh
index 0114a4e..5ad8e60 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-cd "$GITHUB_WORKSPACE" || exit 1
+cd "${GITHUB_WORKSPACE}" || exit 1
 
 export REVIEWDOG_GITHUB_API_TOKEN="${INPUT_GITHUB_TOKEN}"