diff --git a/unity-project/action.yaml b/unity-project/action.yaml
index f672e35..1632d7d 100644
--- a/unity-project/action.yaml
+++ b/unity-project/action.yaml
@@ -50,11 +50,13 @@ runs:
 
       DOWNLOAD_KEYSTORE=${{ inputs.downloadKeystore }}
       if [ -z "$DOWNLOAD_KEYSTORE" ]; then
+        shopt -s nocasematch
         if [[ "${{ inputs.platform }}" = "android" ]]; then
           DOWNLOAD_KEYSTORE=true
         else
           DOWNLOAD_KEYSTORE=false
         fi
+        shopt -u nocasematch
       fi
       echo "downloadKeystore=$DOWNLOAD_KEYSTORE" >> "$GITHUB_OUTPUT"
     shell: bash