diff --git a/selfprivacy_api/services/forgejo/__init__.py b/selfprivacy_api/services/forgejo/__init__.py
index 89c6641..ddea493 100644
--- a/selfprivacy_api/services/forgejo/__init__.py
+++ b/selfprivacy_api/services/forgejo/__init__.py
@@ -27,7 +27,7 @@ class Forgejo(Service):
             id="subdomain",
             default_value="git",
             description="Subdomain",
-            regex=r"[A-Za-z0-9][A-Za-z0-9\-]{0,61}[A-Za-z0-9]",
+            regex=r"^[A-Za-z0-9][A-Za-z0-9\-]{0,61}[A-Za-z0-9]$",
             widget="subdomain",
         ),
         "appName": StringServiceConfigItem(