diff --git a/.dockerignore b/.dockerignore
index cffd296..4eaf9d2 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1 +1,2 @@
+!markdownlint-problem-matcher.json
 !entrypoint.sh
diff --git a/Dockerfile b/Dockerfile
index 03807d4..3778efe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,7 @@
 FROM node:lts-alpine
 
-# hadolint ignore=DL3018
-RUN npm install --global --production markdownlint-cli@0.30.0 \
-  && apk --update --no-cache add curl jq
+RUN npm install --global --production --update-notifier=false markdownlint-cli@0.30.0
 
 COPY entrypoint.sh /entrypoint.sh
+COPY markdownlint-problem-matcher.json /markdownlint-problem-matcher.json
 ENTRYPOINT ["/entrypoint.sh"]
diff --git a/README.md b/README.md
index c5c3e71..988808a 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Basic usage with all options enabled:
 ```yaml
 
       - name: markdownlint-cli
-        uses: nosborn/github-action-markdown-cli@v3.0.0
+        uses: nosborn/github-action-markdown-cli@v3.0.1
         with:
           files: .
           config_file: .markdownlint.yaml
diff --git a/entrypoint.sh b/entrypoint.sh
index 7419411..8df3306 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -6,7 +6,10 @@ MARKDOWNLINT="${MARKDOWNLINT}${INPUT_IGNORE_FILES:+ -i ${INPUT_IGNORE_FILES}}"
 MARKDOWNLINT="${MARKDOWNLINT}${INPUT_IGNORE_PATH:+ -p ${INPUT_IGNORE_PATH}}"
 MARKDOWNLINT="${MARKDOWNLINT}${INPUT_RULES:+ -r ${INPUT_RULES}}"
 
-echo '::add-matcher::.github/markdownlint-problem-matcher.json'
+PROBLEM_MATCHER="$(mktemp -p "${GITHUB_WORKSPACE}")"
+trap 'rm -f "${PROBLEM_MATCHER}"' EXIT
+cp /markdownlint-problem-matcher.json "${PROBLEM_MATCHER:?}" || exit
+echo "::add-matcher::${PROBLEM_MATCHER:?}"
 
 # shellcheck disable=SC2086
 ${MARKDOWNLINT} ${INPUT_FILES}
diff --git a/.github/markdownlint-problem-matcher.json b/markdownlint-problem-matcher.json
similarity index 100%
rename from .github/markdownlint-problem-matcher.json
rename to markdownlint-problem-matcher.json