diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
index 6a2d860..499c5ac 100644
--- a/.github/workflows/verify.yml
+++ b/.github/workflows/verify.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   backend:
     runs-on: ubuntu-latest
-    container: sfja/h5-mst-ci:1.3
+    container: sfja/h5-mst-ci:latest
     steps:
     - uses: actions/checkout@v6
     - name: check
@@ -24,7 +24,7 @@ jobs:
 
   game:
     runs-on: ubuntu-latest
-    container: sfja/h5-mst-ci:1.3
+    container: sfja/h5-mst-ci:latest
     steps:
     - uses: actions/checkout@v6
     - run: rustup default stable
diff --git a/ci-container/Dockerfile b/ci-container/Dockerfile
index 3527b0d..f1a2eab 100644
--- a/ci-container/Dockerfile
+++ b/ci-container/Dockerfile
@@ -3,5 +3,4 @@ RUN apk add --no-cache curl build-base clang22-extra-tools sdl3-dev
 
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
 ENV PATH="/root/.cargo/bin:${PATH}"
-RUN rustup default stable