diff --git a/lib/charms/tls_certificates_interface/v3/tls_certificates.py b/lib/charms/tls_certificates_interface/v3/tls_certificates.py
index 4544118..cbdd80d 100644
--- a/lib/charms/tls_certificates_interface/v3/tls_certificates.py
+++ b/lib/charms/tls_certificates_interface/v3/tls_certificates.py
@@ -137,7 +137,7 @@ def _on_certificate_revocation_request(self, event: CertificateRevocationRequest
     generate_csr,
     generate_private_key,
 )
-from ops.charm import CharmBase, RelationJoinedEvent
+from ops.charm import CharmBase, RelationCreatedEvent
 from ops.main import main
 from ops.model import ActiveStatus, WaitingStatus
 from typing import Union
@@ -151,7 +151,7 @@ def __init__(self, *args):
         self.certificates = TLSCertificatesRequiresV3(self, "certificates")
         self.framework.observe(self.on.install, self._on_install)
         self.framework.observe(
-            self.on.certificates_relation_joined, self._on_certificates_relation_joined
+            self.on.certificates_relation_created, self._on_certificates_relation_created
         )
         self.framework.observe(
             self.certificates.on.certificate_available, self._on_certificate_available
@@ -179,7 +179,7 @@ def _on_install(self, event) -> None:
             {"private_key_password": "banana", "private_key": private_key.decode()}
         )
 
-    def _on_certificates_relation_joined(self, event: RelationJoinedEvent) -> None:
+    def _on_certificates_relation_created(self, event: RelationCreatedEvent) -> None:
         replicas_relation = self.model.get_relation("replicas")
         if not replicas_relation:
             self.unit.status = WaitingStatus("Waiting for peer relation to be created")
@@ -316,7 +316,7 @@ def _on_all_certificates_invalidated(self, event: AllCertificatesInvalidatedEven
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 9
+LIBPATCH = 10
 
 PYDEPS = ["cryptography", "jsonschema"]