diff --git a/dockerfiles/alpine.Dockerfile b/dockerfiles/alpine.Dockerfile
index 6bbae81..e93f0e8 100644
--- a/dockerfiles/alpine.Dockerfile
+++ b/dockerfiles/alpine.Dockerfile
@@ -6,6 +6,7 @@ WORKDIR /app
 RUN <<EOT
   apk update -q
   apk add bash
+  rm -rf /var/cache/apk
   gem update --system --no-document
   gem install -N bundler
 EOT
@@ -18,6 +19,7 @@ ENV BUNDLE_DEPLOYMENT=true \
 
 RUN <<EOT
   apk add musl-dev gcc make
+  rm -rf /var/cache/apk
 EOT
 
 COPY Gemfile* .
diff --git a/dockerfiles/bookworm.Dockerfile b/dockerfiles/bookworm.Dockerfile
index 1fe8628..db330f8 100644
--- a/dockerfiles/bookworm.Dockerfile
+++ b/dockerfiles/bookworm.Dockerfile
@@ -5,6 +5,7 @@ WORKDIR /app
 
 RUN <<EOT
   apt-get update -qq
+  rm -rf /var/lib/apt/lists /var/cache/apt/archives
   gem update --system --no-document
   gem install -N bundler
 EOT
@@ -18,6 +19,7 @@ ENV BUNDLE_DEPLOYMENT=true \
 RUN <<EOT
   apt-get update -qq
   apt-get install --yes --no-install-recommends gcc make libc-dev
+  rm -rf /var/lib/apt/lists /var/cache/apt/archives
 EOT
 
 COPY Gemfile* .