diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7b9b658..5b78755 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,7 +3,7 @@ name: CI
 on:
     push:
         branches: ["**"]
-        tags: ["v*"]
+        tags: ["[0-9]+.[0-9]+.[0-9]+"]
     pull_request:
 
 permissions:
@@ -51,7 +51,7 @@ jobs:
             - name: Determine push conditions
               id: should_push
               run: |
-                  if [[ "${{ github.event_name }}" == "push" && ( "${{ github.ref }}" == "refs/heads/main" || "${{ github.ref }}" == refs/tags/v* ) ]]; then
+                  if [[ "${{ github.event_name }}" == "push" && ( "${{ github.ref }}" == "refs/heads/main" || "${{ github.ref }}" =~ ^refs/tags/[0-9]+\.[0-9]+\.[0-9]+$ ) ]]; then
                     echo "push=true" >> "$GITHUB_OUTPUT"
                   else
                     echo "push=false" >> "$GITHUB_OUTPUT"
@@ -64,7 +64,7 @@ jobs:
                   images: ghcr.io/yuzuzensai/trollssh
                   tags: |
                       type=raw,value=latest,enable={{is_default_branch}}
-                      type=semver,pattern=v{{version}}
+                      type=semver,pattern={{version}}
                       type=sha,prefix=sha-,format=short
 
             - name: Log in to GHCR
diff --git a/README.md b/README.md
index 4473b6e..3efb8e9 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ Generate a frame set from a video through container image
 
 ```sh
 docker run --rm -v ./video.mp4:/home/app/video.mp4 -v ./frames:/home/app/frames \
-    ghcr.io/yuzuzensai/trollssh:v1.1.3 trollssh --generate --video video.mp4 --resolution 512
+    ghcr.io/yuzuzensai/trollssh:1.1.3 trollssh --generate --video video.mp4 --resolution 512
 ```
 
 This writes `frames/<name>.tsf`, a simple container of color JPEG frames plus