diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 3ffdf84..5fe7483 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -14,7 +14,6 @@ env:
   RUBY33: '3.3.1'
   RUBY32: '3.2.4'
   RUBY31: '3.1.5'
-  RUBY30: '3.0.7'
   DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
   DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
 
@@ -46,15 +45,6 @@ jobs:
       with:
         version: ${{ env.RUBY31 }}
         tags: 3.1
-  ruby30:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - uses: docker/setup-buildx-action@v3
-    - uses: ./.github/actions
-      with:
-        version: ${{ env.RUBY30 }}
-        tags: '3.0'
   ### dev
   ruby33-dev:
     runs-on: ubuntu-latest
@@ -86,16 +76,6 @@ jobs:
         version: ${{ env.RUBY31 }}
         dev: 1
         tags: 3.1-dev
-  ruby30-dev:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - uses: docker/setup-buildx-action@v3
-    - uses: ./.github/actions
-      with:
-        version: ${{ env.RUBY30 }}
-        dev: 1
-        tags: 3.0-dev
   ### dev-macos
   ruby33-dev-macos:
     runs-on: ubuntu-latest
@@ -145,19 +125,3 @@ jobs:
         group_id: 20
         tags: 3.1-dev-macos
         platform: linux/amd64,linux/arm64
-  ruby30-dev-macos:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - uses: docker/setup-qemu-action@v3
-      with:
-        platforms: linux/amd64,linux/arm64
-    - uses: docker/setup-buildx-action@v3
-    - uses: ./.github/actions
-      with:
-        version: ${{ env.RUBY30 }}
-        dev: 1
-        user_id: 501
-        group_id: 20
-        tags: 3.0-dev-macos
-        platform: linux/amd64,linux/arm64
diff --git a/.ruby b/.ruby
index 72074a4..9ea483a 100644
--- a/.ruby
+++ b/.ruby
@@ -1,4 +1,3 @@
 3.3.1#2024-05-16T03:00:00.745019Z
 3.2.4#2024-05-16T05:59:59.294617Z
-3.1.5#2024-05-16T05:59:00.711094Z
-3.0.7#2024-05-16T05:58:09.941156Z
\ No newline at end of file
+3.1.5#2024-05-16T05:59:00.711094Z
\ No newline at end of file
diff --git a/README.md b/README.md
index 8d5e555..0af2806 100644
--- a/README.md
+++ b/README.md
@@ -39,15 +39,12 @@ Supported tags and respective `Dockerfile` links:
 - `3.3`, `3`, `latest` [_(Dockerfile)_]
 - `3.2` [_(Dockerfile)_]
 - `3.1` [_(Dockerfile)_]
-- `3.0` [_(Dockerfile)_]
 - `3.3-dev`, `3-dev`, `dev` [_(Dockerfile)_]
 - `3.2-dev` [_(Dockerfile)_]
 - `3.1-dev` [_(Dockerfile)_]
-- `3.0-dev` [_(Dockerfile)_]
 - `3.3-dev-macos`, `3-dev-macos` [_(Dockerfile)_]
 - `3.2-dev-macos` [_(Dockerfile)_]
 - `3.1-dev-macos` [_(Dockerfile)_]
-- `3.0-dev-macos` [_(Dockerfile)_]
 
 [_(Dockerfile)_]: https://github.com/wodby/ruby/tree/master/Dockerfile