diff --git a/.clusterfuzzlite/Dockerfile b/.clusterfuzzlite/Dockerfile
index 05da77acbebd9d6cc6ed2dbac762bec706e3bd85..e42a5556b8c312958087871ccbd388ca33df57af 100644
--- a/.clusterfuzzlite/Dockerfile
+++ b/.clusterfuzzlite/Dockerfile
@@ -1,5 +1,5 @@
 # Base image with clang toolchain
-FROM gcr.io/oss-fuzz-base/base-builder:v1
+FROM gcr.io/oss-fuzz-base/base-builder:v1@sha256:f161edec0c10ad31ced9fcec3d4d0d1dd8a36a22de9ebef136a41dcfac34d1ba
 # install required packages to build your project
 RUN apt-get update && apt-get install -y python3-pip ninja-build
 RUN pip install -U --pre meson