diff --git a/lib/main.sh b/lib/main.sh
index 8270605..f20a83f 100644
--- a/lib/main.sh
+++ b/lib/main.sh
@@ -49,7 +49,7 @@ function run() {
   # to how output formatting works.
   if [[ -n "${OUTPUT_FORMAT}" ]]; then
     OUTPUT=$(eval "${HADOLINT_PATH}" --no-fail --no-color "${CONFIG}" -f "${OUTPUT_FORMAT}" "${DOCKERFILE}")
-    echo hadolint_output="${OUTPUT//$'\n'/'%0A'}" >> "${GITHUB_OUTPUT}"
+    echo \"hadolint_output="${OUTPUT//$'\n'/'%0A'}"\" >>"${GITHUB_OUTPUT}"
   fi
 
   # Eval to remove empty vars