diff --git a/installers/charm/prometheus/src/charm.py b/installers/charm/prometheus/src/charm.py
index e71d949..5fdee72 100755
--- a/installers/charm/prometheus/src/charm.py
+++ b/installers/charm/prometheus/src/charm.py
@@ -112,13 +112,13 @@
         self.prometheus.publish_info(self.app.name, PORT)
 
     def _on_backup_action(self, event: EventBase) -> NoReturn:
-        url = f"http://{self.model.app.name}:{PORT}/api/v2/admin/tsdb/snapshot"
+        url = f"http://{self.model.app.name}:{PORT}/api/v1/admin/tsdb/snapshot"
         result = requests.post(url)
 
         if result.status_code == 200:
             event.set_results({"backup-name": result.json()["name"]})
         else:
-            event.fail(f"status-code: {result.status_code}, result: {result.json()}")
+            event.fail(f"status-code: {result.status_code}")
 
     def _build_files(self, config: ConfigModel):
         files_builder = FilesV3Builder()