diff --git a/roles/manage-server/templates/metadata_configuration/oidc10_rp.schema.json.j2 b/roles/manage-server/templates/metadata_configuration/oidc10_rp.schema.json.j2
index 869f3d892..0ba7e116b 100644
--- a/roles/manage-server/templates/metadata_configuration/oidc10_rp.schema.json.j2
+++ b/roles/manage-server/templates/metadata_configuration/oidc10_rp.schema.json.j2
@@ -33,8 +33,8 @@
           "use_as_nameid": {
             "type": "boolean"
           }
-
-        }
+        },
+        "additionalProperties": false
       }
     }
   },
diff --git a/roles/manage-server/templates/metadata_configuration/saml20_sp.schema.json.j2 b/roles/manage-server/templates/metadata_configuration/saml20_sp.schema.json.j2
index 9224943bd..2679f2f6e 100644
--- a/roles/manage-server/templates/metadata_configuration/saml20_sp.schema.json.j2
+++ b/roles/manage-server/templates/metadata_configuration/saml20_sp.schema.json.j2
@@ -61,7 +61,8 @@
           "use_as_nameid": {
             "type": "boolean"
           }
-        }
+        },
+        "additionalProperties": false
       }
     }
   },
diff --git a/roles/manage-server/templates/metadata_configuration/single_tenant_template.schema.json.j2 b/roles/manage-server/templates/metadata_configuration/single_tenant_template.schema.json.j2
index 0a928e7fe..5d6fda209 100644
--- a/roles/manage-server/templates/metadata_configuration/single_tenant_template.schema.json.j2
+++ b/roles/manage-server/templates/metadata_configuration/single_tenant_template.schema.json.j2
@@ -47,7 +47,8 @@
           "use_as_nameid": {
             "type": "boolean"
           }
-        }
+        },
+        "additionalProperties": false
       }
     }
   },