diff --git a/lib/charms/prometheus_k8s/v1/prometheus_remote_write.py b/lib/charms/prometheus_k8s/v1/prometheus_remote_write.py
index 049c8faf..cf24b9f7 100644
--- a/lib/charms/prometheus_k8s/v1/prometheus_remote_write.py
+++ b/lib/charms/prometheus_k8s/v1/prometheus_remote_write.py
@@ -46,7 +46,7 @@
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 3
+LIBPATCH = 4
 
 PYDEPS = ["cosl"]
 
@@ -749,6 +749,7 @@ def alerts(self) -> dict:
 
             _, errmsg = self._tool.validate_alert_rules(alert_rules)
             if errmsg:
+                logger.error(f"Invalid alert rule file: {errmsg}")
                 if self._charm.unit.is_leader():
                     data = json.loads(relation.data[self._charm.app].get("event", "{}"))
                     data["errors"] = errmsg
diff --git a/requirements.txt b/requirements.txt
index 461ced56..86ed5997 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,5 @@ pyaml
 requests
 lightkube >= 0.11
 lightkube-models >= 1.22.0.4
-
 # From PYDEPS
 importlib-metadata~=6.0.0