diff --git a/Dockerfile b/Dockerfile
index fb4995a..5ffff2a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.1-fpm-bullseye
+FROM php:8.3-fpm-bullseye
 
 # install the PHP extensions we need
 RUN set -eux; \