diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 1876826f..84a9ecb9 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/devcontainers/java:25
+FROM mcr.microsoft.com/devcontainers/java:25@sha256:5549bc9f2176f4ce864e5774c2dedd400085a45bd145d51bf322806008243481
 
 # Install Node.js LTS
 RUN curl -fsSL https://deb.nodesource.com/setup_24.x | bash - && \