diff --git a/sync-server/Dockerfile b/sync-server/Dockerfile
index cfb76138..77599b2c 100644
--- a/sync-server/Dockerfile
+++ b/sync-server/Dockerfile
@@ -1,4 +1,4 @@
-FROM rust:1.90-slim-trixie AS builder
+FROM rust:1.91-slim-trixie AS builder
 
 WORKDIR /usr/src/backend