diff --git a/Package.swift b/Package.swift
index e0a5b4f..316624c 100644
--- a/Package.swift
+++ b/Package.swift
@@ -34,6 +34,6 @@ let package = Package(
       ]
     ),
   ],
-  cLanguageStandard: .gnu99,
+//  cLanguageStandard: .gnu99,
   cxxLanguageStandard: .gnucxx11
 )