diff --git a/docker-compose.yml b/docker-compose.yml
index 3ea8412..ce23970 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,7 +5,7 @@ services:
   #############################################################
   jmc-delfax-net:
     container_name: jmc-delfax-nginx
-    image: nginx
+    image: nginx:1.21.4
     restart: unless-stopped
     # when used with nginx-proxy-manager, we don't need to expose
     # any ports, and npm connects to the container's port