diff --git a/crates/kingfisher-rules/data/rules/azure-notification-hub.yml b/crates/kingfisher-rules/data/rules/azure-notification-hub.yml
index 01321b6..6e3ce2f 100644
--- a/crates/kingfisher-rules/data/rules/azure-notification-hub.yml
+++ b/crates/kingfisher-rules/data/rules/azure-notification-hub.yml
@@ -45,7 +45,7 @@ rules:
       ["']?
       (
         [A-Za-z0-9]
-        [A-Za-z0-9._-]{6,64}
+        [A-Za-z0-9._-]{6,63}
       )
       ["']?
       \b
@@ -70,7 +70,7 @@ rules:
       ["']?
       (
         [A-Za-z]
-        [A-Za-z0-9_-]{2,63}
+        [A-Za-z0-9_-]{6,63}
       )
       ["']?
       \b