diff --git a/Dockerfile b/Dockerfile
index 633e71dd..d3416991 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build libdispatch for the strip binary
-FROM --platform=linux/amd64 debian:12-slim AS libdispatch-build
+FROM --platform=linux/amd64 ghcr.io/getsentry/image-mirror-library-debian:12.15-slim AS libdispatch-build
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
@@ -27,7 +27,7 @@ RUN git clone https://github.com/apple/swift-corelibs-libdispatch.git && \
     make install
 
 # Use Python 3.14 slim image
-FROM python:3.14.4-slim-bookworm
+FROM ghcr.io/getsentry/image-mirror-library-python:3.14.4-slim-bookworm
 
 # Build argument to determine if this is a test build
 ARG TEST_BUILD=false
diff --git a/scripts/strip/Dockerfile.cctools b/scripts/strip/Dockerfile.cctools
index 0cc8af51..0e77cacc 100644
--- a/scripts/strip/Dockerfile.cctools
+++ b/scripts/strip/Dockerfile.cctools
@@ -1,5 +1,5 @@
 # Build the Apple cctools 'strip' from cctools-port on Linux
-FROM --platform=linux/amd64 debian:12-slim AS build
+FROM --platform=linux/amd64 ghcr.io/getsentry/image-mirror-library-debian:12.15-slim AS build
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
@@ -55,7 +55,7 @@ RUN ./configure --prefix=/out
 RUN make -j"$(nproc)" && make install-strip
 
 # Verify the binary is working
-FROM --platform=linux/amd64 python:3.14.4-slim-bookworm AS verify
+FROM --platform=linux/amd64 ghcr.io/getsentry/image-mirror-library-python:3.14.4-slim-bookworm AS verify
 # Install runtime dependencies needed by the strip binaries
 RUN apt-get update && apt-get install -y --no-install-recommends \
     libbsd0 \
diff --git a/tests/e2e/Dockerfile.test-runner b/tests/e2e/Dockerfile.test-runner
index 44418da2..6ede91fb 100644
--- a/tests/e2e/Dockerfile.test-runner
+++ b/tests/e2e/Dockerfile.test-runner
@@ -1,4 +1,4 @@
-FROM python:3.14.4-slim-bookworm
+FROM ghcr.io/getsentry/image-mirror-library-python:3.14.4-slim-bookworm
 
 # Install uv
 RUN python3 -m pip --no-cache-dir --disable-pip-version-check install 'uv==0.11.17'
diff --git a/tests/e2e/mock-sentry-api/Dockerfile b/tests/e2e/mock-sentry-api/Dockerfile
index b9db178e..035cf21e 100644
--- a/tests/e2e/mock-sentry-api/Dockerfile
+++ b/tests/e2e/mock-sentry-api/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.14.4-slim-bookworm
+FROM ghcr.io/getsentry/image-mirror-library-python:3.14.4-slim-bookworm
 
 # Install uv
 RUN python3 -m pip --no-cache-dir --disable-pip-version-check install 'uv==0.11.17'