diff --git a/entrypoint.sh b/entrypoint.sh
index 53f3fda..852da21 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -29,11 +29,11 @@ export REVIEWDOG_GITHUB_API_TOKEN="${INPUT_GITHUB_TOKEN}"
 # run check
 { echo "Run check with"; java -jar /opt/lib/checkstyle.jar --version; } | sed ':a;N;s/\n/ /;ba'
 
-exec java -jar /opt/lib/checkstyle.jar "${INPUT_WORKDIR}" -c "${INPUT_CHECKSTYLE_CONFIG}" ${OPTIONAL_PROPERTIES_FILE} -f xml \
+exec java -jar /opt/lib/checkstyle.jar "${INPUT_WORKDIR}" -c "${INPUT_CHECKSTYLE_CONFIG}" "${OPTIONAL_PROPERTIES_FILE}" -f xml \
   | reviewdog -f=checkstyle \
       -name="checkstyle" \
       -reporter="${INPUT_REPORTER:-github-pr-check}" \
       -filter-mode="${INPUT_FILTER_MODE:-added}" \
       -fail-level="${INPUT_FAIL_LEVEL:-error}" \
       -level="${INPUT_LEVEL}" \
-      ${INPUT_REVIEWDOG_FLAGS} -
+      "${INPUT_REVIEWDOG_FLAGS}" -