diff --git a/services/simplesamlphp/Dockerfile b/services/simplesamlphp/Dockerfile
index 2504798b..10759a24 100644
--- a/services/simplesamlphp/Dockerfile
+++ b/services/simplesamlphp/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.4-apache@sha256:4f0f7e622b2a919e1c1aac259df5c44653e6abd647aafda0b34767c30833e27e
+FROM php:8.5-apache@sha256:670ca5334e4c3b6ef13f70b86b542c09272795fef1653f1b774ea0f3eefd1892
 
 RUN set -eux; \
     apt-get update; \