diff --git a/services/simplesamlphp/Dockerfile b/services/simplesamlphp/Dockerfile
index 37a16b95b..8ae47f094 100644
--- a/services/simplesamlphp/Dockerfile
+++ b/services/simplesamlphp/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.3-apache@sha256:dece6673f3e0a4fdf47f797f85403931c72481d56e4086566ee5169e3eeb7011
+FROM php:8.5-apache@sha256:33ee34a05c6a4a2b6cddc798e439f34c7784e7c44c0d8da0e92317e908e93bc7
 
 RUN set -eux; \
     apt-get update; \