diff --git a/services/simplesamlphp/Dockerfile b/services/simplesamlphp/Dockerfile
index cd14204e9..9761af3ce 100644
--- a/services/simplesamlphp/Dockerfile
+++ b/services/simplesamlphp/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.4-apache@sha256:ea61837b6dee7f5981cced9fdf6a7773c4ef695bc3237fb9da59d223df638ec2
+FROM php:8.5-apache@sha256:eacc0d98992683cb46e4f8f44b2418a0323855dc8b59d32dc54f7a9b90a966dd
 
 RUN set -eux; \
     apt-get update; \