diff --git a/ui/src/assets/schema/provider/filebacked-http-advanced.schema.json b/ui/src/assets/schema/provider/filebacked-http-advanced.schema.json
index fd402bf93..a71374bd7 100644
--- a/ui/src/assets/schema/provider/filebacked-http-advanced.schema.json
+++ b/ui/src/assets/schema/provider/filebacked-http-advanced.schema.json
@@ -80,7 +80,8 @@
                             "PT24H"
                         ]
                     },
-                    "default": ""
+                    "default": null,
+                    "pattern": "^(R\\d*\\/)?P(?:\\d+(?:\\.\\d+)?Y)?(?:\\d+(?:\\.\\d+)?M)?(?:\\d+(?:\\.\\d+)?W)?(?:\\d+(?:\\.\\d+)?D)?(?:T(?:\\d+(?:\\.\\d+)?H)?(?:\\d+(?:\\.\\d+)?M)?(?:\\d+(?:\\.\\d+)?S)?)?$"
                 },
                 "connectionTimeout": {
                     "type": "string",
@@ -101,7 +102,8 @@
                             "PT24H"
                         ]
                     },
-                    "default": ""
+                    "default": null,
+                    "pattern": "^(R\\d*\\/)?P(?:\\d+(?:\\.\\d+)?Y)?(?:\\d+(?:\\.\\d+)?M)?(?:\\d+(?:\\.\\d+)?W)?(?:\\d+(?:\\.\\d+)?D)?(?:T(?:\\d+(?:\\.\\d+)?H)?(?:\\d+(?:\\.\\d+)?M)?(?:\\d+(?:\\.\\d+)?S)?)?$"
                 },
                 "socketTimeout": {
                     "type": "string",
@@ -122,7 +124,8 @@
                             "PT24H"
                         ]
                     },
-                    "default": ""
+                    "default": null,
+                    "pattern": "^(R\\d*\\/)?P(?:\\d+(?:\\.\\d+)?Y)?(?:\\d+(?:\\.\\d+)?M)?(?:\\d+(?:\\.\\d+)?W)?(?:\\d+(?:\\.\\d+)?D)?(?:T(?:\\d+(?:\\.\\d+)?H)?(?:\\d+(?:\\.\\d+)?M)?(?:\\d+(?:\\.\\d+)?S)?)?$"
                 },
                 "disregardTLSCertificate": {
                     "type": "boolean",