diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 5b4c3927..591ce88e 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -28,6 +28,6 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           # See Dockerfile.build for instructions on bumping this.
-          tags: ewjoachim/python-coverage-comment-action-base:v1
+          tags: ewjoachim/python-coverage-comment-action-base:v2
           push: true
           file: Dockerfile.build
diff --git a/Dockerfile.build b/Dockerfile.build
index 38e313c3..4ebc928c 100644
--- a/Dockerfile.build
+++ b/Dockerfile.build
@@ -2,7 +2,7 @@
 # - Dockerfile
 # - .github/workflows/docker.yml
 
-FROM python:3.10-slim
+FROM python:3.11-slim
 
 RUN set -eux; \
     apt-get update; \
@@ -15,7 +15,6 @@ RUN git config --system --add safe.directory '*'
 WORKDIR /workdir
 
 COPY pyproject.toml ./
-COPY poetry.lock ./
 COPY coverage_comment ./coverage_comment
 ENV PIP_DISABLE_PIP_VERSION_CHECK=1
 ENV PIP_ROOT_USER_ACTION=ignore