diff --git a/manifest.json b/manifest.json
index a6dfd4b..28a83dd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -80,7 +80,7 @@
                 "default": false
             },
             {
-                "name": "registration-approval",
+                "name": "registration_approval",
                 "type": "boolean",
                 "ask": {
                     "en": "Registration approval?",
@@ -93,7 +93,7 @@
                 "default": true
             },
             {
-                "name": "registration-reason",
+                "name": "registration_reason",
                 "type": "boolean",
                 "ask": {
                     "en": "Request registration reason?",
diff --git a/scripts/install b/scripts/install
index 3465ad7..3a19e23 100755
--- a/scripts/install
+++ b/scripts/install
@@ -29,8 +29,8 @@ admin=$YNH_APP_ARG_ADMIN
 email=$YNH_APP_ARG_EMAIL
 password=$YNH_APP_ARG_PASSWORD
 registration=$YNH_APP_ARG_REGISTRATION
-registration-approval=$YNH_APP_ARG_REGISTRATION_APPROVAL
-registration-reason=$YNH_APP_ARG_REGISTRATION_REASON
+registration_approval=$YNH_APP_ARG_REGISTRATION_APPROVAL
+registration_reason=$YNH_APP_ARG_REGISTRATION_REASON
 
 ### If it's a multi-instance app, meaning it can be installed several times independently
 ### The id of the app as stated in the manifest is available as $YNH_APP_ID