diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index 61d9a6deb5..f92c813f6e 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -13,7 +13,7 @@
 # ---------------------------------------------------------------------------
 # Stage 1 -- Builder (ephemeral: compiles deps + project wheel)
 # ---------------------------------------------------------------------------
-FROM python:3.14.3-slim@sha256:6869258bd3dd1e6947f4e9a375319809cd02f29312ed70aabe98d8086905cfd4 AS builder
+FROM python:3.14.3-slim@sha256:5e59aae31ff0e87511226be8e2b94d78c58f05216efda3b07dbbed938ec8583b AS builder
 
 COPY --from=ghcr.io/astral-sh/uv:0.10.9@sha256:10902f58a1606787602f303954cea099626a4adb02acbac4c69920fe9d278f82 /uv /uvx /bin/