diff --git a/app-server/Dockerfile b/app-server/Dockerfile
index 5739d0cf6..810b8fca0 100644
--- a/app-server/Dockerfile
+++ b/app-server/Dockerfile
@@ -1,5 +1,5 @@
 # Build stage with cargo chef for dependency caching
-FROM rust:1.90-slim-bullseye AS chef
+FROM rust:1.91-slim-bullseye AS chef
 WORKDIR /app-server
 
 # Install build dependencies and cargo-chef