diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 71330ba..7f2751e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -65,43 +65,3 @@ jobs:
       with:
         version: latest
         args: release --snapshot --skip-publish --rm-dist --debug
-
-  publish_dev_image:
-    name: Publish Dev Image
-    runs-on: ubuntu-latest
-    if: github.ref == 'refs/heads/master' && github.event_name == 'push'
-    steps:
-      - name: Check out
-        uses: actions/checkout@v3
-      - name: Set up Go 1.x
-        uses: actions/setup-go@v3
-        with:
-          go-version: ~1.16
-        id: go
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
-        with:
-          registry: ghcr.io
-          username: pfnet-research
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build Snapshots
-        uses: goreleaser/goreleaser-action@v3
-        with:
-          version: latest
-          args: release --snapshot --rm-dist --debug
-        # Mimic docker, docker_manifests artifacts in goreleaser here.
-        # because "goreleaser release --snapshot" does NOT publish any artifact
-      - name: Publish Snapshot Images
-        shell: bash
-        run: |
-          set -euo pipefail
-          IMAGES=($(jq -r '.[] | select(.type=="Docker Image") | .name' dist/artifacts.json))
-          for i in ${IMAGES[@]}; do
-            docker push $i
-          done
-          MANIFEST=$(jq '.[] | select(.type=="Docker Image") | .name' dist/artifacts.json | jq -sr '.[0]' | sed -e "s|-[a-z0-9]\+$||g")
-          docker manifest create ${MANIFEST} ${IMAGES[@]}
-          docker manifest push ${MANIFEST}
-          MANIFEST_LATEST=$(jq '.[] | select(.type=="Docker Image") | .name' dist/artifacts.json | jq -sr '.[0]' | sed -e "s|:.*$||g"):latest
-          docker manifest create ${MANIFEST_LATEST} ${IMAGES[@]}
-          docker manifest push ${MANIFEST_LATEST}
diff --git a/.github/workflows/publish_dev_image.yaml b/.github/workflows/publish_dev_image.yaml
new file mode 100644
index 0000000..d562d4b
--- /dev/null
+++ b/.github/workflows/publish_dev_image.yaml
@@ -0,0 +1,47 @@
+name: Publish Dev Image
+
+on:
+  push:
+    branches: [ master ]
+    tags-ignore: [ "**" ]
+    paths-ignore: [ "**.md" ]
+
+jobs:
+  publish_dev_image:
+    name: Publish Dev Image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out
+        uses: actions/checkout@v3
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v3
+        with:
+          go-version: ~1.16
+        id: go
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: pfnet-research
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build Snapshots
+        uses: goreleaser/goreleaser-action@v3
+        with:
+          version: latest
+          args: release --snapshot --rm-dist --debug
+        # Mimic docker, docker_manifests artifacts in goreleaser here.
+        # because "goreleaser release --snapshot" does NOT publish any artifact
+      - name: Publish Snapshot Images
+        shell: bash
+        run: |
+          set -euo pipefail
+          IMAGES=($(jq -r '.[] | select(.type=="Docker Image") | .name' dist/artifacts.json))
+          for i in ${IMAGES[@]}; do
+            docker push $i
+          done
+          MANIFEST=$(jq '.[] | select(.type=="Docker Image") | .name' dist/artifacts.json | jq -sr '.[0]' | sed -e "s|-[a-z0-9]\+$||g")
+          docker manifest create ${MANIFEST} ${IMAGES[@]}
+          docker manifest push ${MANIFEST}
+          MANIFEST_LATEST=$(jq '.[] | select(.type=="Docker Image") | .name' dist/artifacts.json | jq -sr '.[0]' | sed -e "s|:.*$||g"):latest
+          docker manifest create ${MANIFEST_LATEST} ${IMAGES[@]}
+          docker manifest push ${MANIFEST_LATEST}