diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
new file mode 100644
index 0000000..68d0e94
--- /dev/null
+++ b/.github/workflows/c-cpp.yml
@@ -0,0 +1,19 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup
+      run: make setup_test
+    - name: Test
+      run: make test
diff --git a/Dockerfile b/Dockerfile
index 664019a..c2ba141 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-from ruby:3.0.0-slim
+from ruby:3.0.4-slim
 
 RUN apt update && apt -y upgrade
 RUN apt install -y \
@@ -14,7 +14,7 @@ RUN apt install -y \
 RUN gem update --system
 
 ARG USER_ID
-RUN useradd -m -u $USER_ID mrubyc
+RUN if [ $USER_ID -eq 0 ]; then export USER_ID=1000; fi && useradd -m -u $USER_ID mrubyc
 RUN mkdir /work && chown mrubyc /work
 
 USER mrubyc
diff --git a/Gemfile.lock b/Gemfile.lock
index 191840f..9707738 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,25 +1,23 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (6.1.6)
+    activesupport (7.0.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-      zeitwerk (~> 2.3)
     concurrent-ruby (1.1.10)
     i18n (1.10.0)
       concurrent-ruby (~> 1.0)
     minitest (5.15.0)
-    mrubyc-test (0.7.0)
-      activesupport (~> 6.0)
+    mrubyc-test (0.7.2)
+      activesupport (~> 7.0)
       rufo (~> 0.12)
-      thor (~> 1.0)
+      thor (~> 1.2)
     rufo (0.13.0)
     thor (1.2.1)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
-    zeitwerk (2.5.4)
 
 PLATFORMS
   ruby