diff --git a/services/simplesamlphp/Dockerfile b/services/simplesamlphp/Dockerfile
index 0ec8bc29..d7c8e4e1 100644
--- a/services/simplesamlphp/Dockerfile
+++ b/services/simplesamlphp/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.4-apache@sha256:5489a66a463f350f77045ec0ec313dcbc4a5b78f32040b946cf694c9d5c7689d
+FROM php:8.5-apache@sha256:613544da9bc080551901e6ee7784e6c573bcbc635453b96ce6f14be13d29b03d
 
 RUN set -eux; \
     apt-get update; \