diff --git a/tofu/.devcontainer/Dockerfile b/tofu/.devcontainer/Dockerfile
index 681edc4..e2b8c14 100644
--- a/tofu/.devcontainer/Dockerfile
+++ b/tofu/.devcontainer/Dockerfile
@@ -1,5 +1,5 @@
 # You can pick any Debian/Ubuntu-based image. 😊
-FROM mcr.microsoft.com/vscode/devcontainers/base:trixie
+FROM mcr.microsoft.com/vscode/devcontainers/base:trixie@sha256:1a00517e89d3075f8c9dc8d9911404de0ff8991a4d71c62068573e9b016a89da
 
 # Add OpenTofu repo
 RUN install -m 0755 -d /etc/apt/keyrings \