diff --git a/README.md b/README.md
index f0e79d7..e600240 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,7 @@ The following code has been tested with Debian 8, it should work on Ubuntu as we
 * `gitea_disable_gravatar`: Do you want to disable Gravatar ? (privacy and so on) (true/false)
 * `gitea_offline_mode`: Same but for disabling CDNs for frontend assets (true/false)
 * `gitea_disable_registration`: Do you want to disable user registration ? (true/false)
+* `gitea_only_allow_external_registration`: Do you want to force registration only using third-party services ? (true/false)
 * `gitea_show_registration_button`: Do you want to show the registration button? (true/false)
 * `gitea_require_signin`: Do you require a signin to see repo's (even public ones) ? (true/false)
 * `gitea_enable_captcha`: Do you want to enable captcha's ? (true/false)
diff --git a/defaults/main.yml b/defaults/main.yml
index 919797b..f301092 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -42,6 +42,7 @@ gitea_disable_registration: false
 gitea_show_registration_button: true
 gitea_require_signin: true
 gitea_enable_captcha: true
+gitea_only_allow_external_registration: false
 
 gitea_force_private: false
 
diff --git a/templates/gitea.ini.j2 b/templates/gitea.ini.j2
index e8412d4..b0dd770 100644
--- a/templates/gitea.ini.j2
+++ b/templates/gitea.ini.j2
@@ -111,6 +111,7 @@ RECAPTCHA_SECRET  =
 RECAPTCHA_SITEKEY =
 ; Show Registration button
 SHOW_REGISTRATION_BUTTON = {{ gitea_show_registration_button }}
+ALLOW_ONLY_EXTERNAL_REGISTRATION = {{ gitea_only_allow_external_registration }}
 
 [mailer]
 ENABLED                 = {{ gitea_mailer_enabled }}