diff --git a/assets/runtime/config/nginx/gitlab b/assets/runtime/config/nginx/gitlab
index f4a4760f..2dc4b868 100644
--- a/assets/runtime/config/nginx/gitlab
+++ b/assets/runtime/config/nginx/gitlab
@@ -55,7 +55,7 @@ server {
     ## By overwriting Host and clearing X-Forwarded-Host we ensure that
     ## internal HTTP redirects generated by GitLab always send users to
     ## YOUR_SERVER_FQDN.
-    proxy_set_header    Host                {{GITLAB_HOST}};
+    proxy_set_header    Host                {{GITLAB_HOST}}:{{GITLAB_PORT}};
     proxy_set_header    X-Forwarded-Host    "";
 
     proxy_set_header    X-Real-IP           $remote_addr;
diff --git a/assets/runtime/config/nginx/gitlab-ssl b/assets/runtime/config/nginx/gitlab-ssl
index bd6d21b4..de2c9251 100644
--- a/assets/runtime/config/nginx/gitlab-ssl
+++ b/assets/runtime/config/nginx/gitlab-ssl
@@ -101,7 +101,7 @@ server {
     ## By overwriting Host and clearing X-Forwarded-Host we ensure that
     ## internal HTTP redirects generated by GitLab always send users to
     ## YOUR_SERVER_FQDN.
-    proxy_set_header    Host                {{GITLAB_HOST}};
+    proxy_set_header    Host                {{GITLAB_HOST}}:{{GITLAB_PORT}};
     proxy_set_header    X-Forwarded-Host    "";
 
     proxy_set_header    X-Real-IP           $remote_addr;