diff --git a/react-rust-postgres/backend/Dockerfile b/react-rust-postgres/backend/Dockerfile
index fe7b0e1..e396b30 100644
--- a/react-rust-postgres/backend/Dockerfile
+++ b/react-rust-postgres/backend/Dockerfile
@@ -38,7 +38,7 @@ FROM base AS builder
 
 RUN cargo build --release --offline
 
-FROM debian:buster-slim
+FROM debian:buster-slim@sha256:557ee531b81ce380d012d83b7bb56211572e5d6088d3e21a3caef7d7ed7f718b
 
 ENV ROCKET_ENV=production