diff --git a/docker/Dockerfile b/docker/Dockerfile
index 960ea8b..766e6d3 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,5 +1,5 @@
 # Build stage
-FROM debian:bookworm AS builder
+FROM debian:bookworm-20260623@sha256:30482e873082e906a4908c10529180aefb6f77620aea7404b909829fadc5d168 AS builder
 
 RUN apt-get update && apt-get install -y \
     build-essential \