diff --git a/Dockerfile b/Dockerfile
index 45b6459..e8f4309 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM python:3.11-slim@sha256:193fdd0bbcb3d2ae612bd6cc3548d2f7c78d65b549fcaa8af75624c47474444d
 
 # Install deps
 COPY requirements.txt .