diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 60ecc24..d0f3956 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -32,5 +32,5 @@ jobs:
           push: true
           tags: |
             ghcr.io/babbel/ruru-lambda:latest
-            ghcr.io/babbel/ruru-lambda:build-ruby2.7
+            ghcr.io/babbel/ruru-lambda:build-ruby3.2
             ghcr.io/babbel/ruru-lambda:${{ github.event.release.tag_name }}
diff --git a/Dockerfile b/Dockerfile
index accdc88..4ba6822 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM lambci/lambda:build-ruby2.7
+FROM public.ecr.aws/sam/build-ruby3.2:latest-x86_64
 
 RUN set -eux; \
     yum install -y build-essential curl openssl-devel; \