diff --git a/internal/repository/user/authenticator/publickey.go b/internal/repository/user/authenticator/publickey.go
index 9b77d21645..e08b25c7e7 100644
--- a/internal/repository/user/authenticator/publickey.go
+++ b/internal/repository/user/authenticator/publickey.go
@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	publicKeyPrefix      = eventPrefix + "pk."
+	publicKeyPrefix      = eventPrefix + "public_key."
 	PublicKeyCreatedType = publicKeyPrefix + "created"
 	PublicKeyDeletedType = publicKeyPrefix + "deleted"
 )