diff --git a/lib/facebook_ads/ad_objects/server_side/util.rb b/lib/facebook_ads/ad_objects/server_side/util.rb
index cca00aa8..b0d846af 100644
--- a/lib/facebook_ads/ad_objects/server_side/util.rb
+++ b/lib/facebook_ads/ad_objects/server_side/util.rb
@@ -203,7 +203,7 @@ def self.normalize_phone(phone)
 					normalized_phone = normalized_phone.gsub(PHONE_NUMBER_DROP_PREFIX_ZEROS, '')
 				end
 
-				if normalized_phone.length < 7 || normalized_phone.length > 15
+				if normalized_phone.length < 7 || normalized_phone.length > 16
 					return nil;
 				end