diff --git a/unity-command/action.yaml b/unity-command/action.yaml
index 4bd47b9..99e8e26 100644
--- a/unity-command/action.yaml
+++ b/unity-command/action.yaml
@@ -68,6 +68,7 @@ runs:
         COMMAND="-nographics $COMMAND"
       fi
       echo "command=$COMMAND" >> "$GITHUB_OUTPUT"
+    shell: bash
   - name: "Run Unity command."
     uses: act/unity/unity@master
     with: