diff --git a/jscore.cpp b/jscore.cpp
index bb9e7cd..c16a494 100644
--- a/jscore.cpp
+++ b/jscore.cpp
@@ -126,9 +126,11 @@ namespace jscore {
         return score.size();
     }
     string getUserName(const int index) {
+        if (score.size()==0 || index >= score.size()) return "";
         return score[index].name;
     }
     const int getPoints(const int index) {
+        if (score.size()==0 || index >= score.size()) return 0;
         return score[index].points;
     }