1 files changed, 2 insertions, 2 deletions

diff --git a/include/plist/Utils.h b/include/plist/Utils.h
index b499635..f3e2685 100644
--- a/include/plist/Utils.h
+++ b/include/plist/Utils.h
@@ -30,8 +30,8 @@ namespace PList
     class Utils
     {
         public:
-            static Structure* FromXml(std::string& in);
-            static Structure* FromBin(std::vector<char>& in);
+            static Structure* FromXml(const std::string& in);
+            static Structure* FromBin(const std::vector<char>& in);
 
         private:
             Utils();