diff --git a/.github/workflows/ShellCheck.yml b/.github/workflows/ShellCheck.yml
index d6bbb8c..e115d4d 100644
--- a/.github/workflows/ShellCheck.yml
+++ b/.github/workflows/ShellCheck.yml
@@ -5,8 +5,10 @@ jobs:
     name: ShellCheck
     runs-on: ubuntu-latest
     steps:
+
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@v2
+
     - name: Run ShellCheck
       uses: ./
       with:
diff --git a/Dockerfile b/Dockerfile
index e4783f7..4738ce6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,4 +3,6 @@ FROM alpine:3.12.0
 RUN apk add --no-cache shellcheck bash
 
 COPY runaction /action/runaction
+COPY .github/problem-matcher.json /problem-matcher.json
+
 ENTRYPOINT ["bash", "/action/runaction"]
\ No newline at end of file
diff --git a/runaction b/runaction
index e5f4a7f..df5dc53 100755
--- a/runaction
+++ b/runaction
@@ -1,7 +1,11 @@
 #!/bin/bash
 
 ## Enable problem matcher
+cp /problem-matcher.json ./problem-matcher.json
 
+echo "::add-matcher::problem-matcher.json"
+
+## Run action
 cd "$GITHUB_WORKSPACE" || exit 1
 
 declare statuscode