diff --git a/Dockerfile b/Dockerfile
index b7ee88a..867f8fd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ ARG NEXTCLOUD_VERSION=23.0.0
 ARG PHP_VERSION=8.0
 ARG NGINX_VERSION=1.20
 
-ARG ALPINE_VERSION=3.14
+ARG ALPINE_VERSION=3.15
 ARG HARDENED_MALLOC_VERSION=8
 
 ARG UID=1000