diff --git a/.github/workflows/depup.yml b/.github/workflows/depup.yml
index 79336db..7df772f 100644
--- a/.github/workflows/depup.yml
+++ b/.github/workflows/depup.yml
@@ -18,7 +18,7 @@ jobs:
           repo: reviewdog/reviewdog
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v2
+        uses: peter-evans/create-pull-request@v3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           title: "chore(deps): update reviewdog to ${{ steps.depup.outputs.latest }}"
diff --git a/Dockerfile b/Dockerfile
index ef39a36..94dec5b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.12
+FROM alpine:3.13
 
 ENV REVIEWDOG_VERSION=v0.11.0
 
diff --git a/README.md b/README.md
index d319d52..c2466f1 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - run: gofmt -w -s .
-      - uses: reviewdog/action-suggester@master
+      - uses: reviewdog/action-suggester@v1
         with:
           tool_name: gofmt
   shell:
@@ -78,7 +78,7 @@ jobs:
 
       - run: shfmt -i 2 -ci -w .
       - name: suggester / shfmt
-        uses: reviewdog/action-suggester@master
+        uses: reviewdog/action-suggester@v1
         with:
           tool_name: shfmt
 
@@ -91,7 +91,7 @@ jobs:
           rm -rf "shellcheck-${scversion}/shellcheck"
       - run: shellcheck -f diff $(shfmt -f .) | patch -p1
       - name: suggester / shellcheck
-        uses: reviewdog/action-suggester@master
+        uses: reviewdog/action-suggester@v1
         with:
           tool_name: shellcheck
 ```