diff --git a/public/v4/apps/mailtrain.yml b/public/v4/apps/mailtrain.yml
index e33cfb8..e5dcf1b 100644
--- a/public/v4/apps/mailtrain.yml
+++ b/public/v4/apps/mailtrain.yml
@@ -46,14 +46,14 @@ services:
         caproverExtra:
             containerHttpPort: '3000'
     $$cap_appname-$$cap_mailtrain_sandbox-appname:
-        image: caprover/nginx-reverse-proxy:latest
+        image: caprover/nginx-reverse-proxy:1-ef5ffcb
         restart: always
         depends_on:
             - $$cap_appname
         environment:
             UPSTREAM_HTTP_ADDRESS: http://srv-captain--$$cap_appname:3003
     $$cap_appname-$$cap_mailtrain_lists-appname:
-        image: caprover/nginx-reverse-proxy:latest
+        image: caprover/nginx-reverse-proxy:1-ef5ffcb
         restart: always
         depends_on:
             - $$cap_appname
diff --git a/public/v4/apps/nginx-reverse-proxy.yml b/public/v4/apps/nginx-reverse-proxy.yml
index cf94109..a01f997 100644
--- a/public/v4/apps/nginx-reverse-proxy.yml
+++ b/public/v4/apps/nginx-reverse-proxy.yml
@@ -1,13 +1,17 @@
 captainVersion: 4
 services:
     $$cap_appname:
-        image: caprover/nginx-reverse-proxy:latest
+        image: caprover/nginx-reverse-proxy:$$cap__version
         restart: always
         environment:
             UPSTREAM_HTTP_ADDRESS: $$cap_upstream_http_address
             CLIENT_MAX_BODY_SIZE: $$cap_max_body_size
 caproverOneClickApp:
     variables:
+        - id: $$cap__version
+          label: Version
+          defaultValue: 1-ef5ffcb
+          description: 'Additional tags can be found here: https://hub.docker.com/r/caprover/nginx-reverse-proxy/tags'
         - id: $$cap_upstream_http_address
           label: Upstream address
           description: >-