diff --git a/histogram.cpp b/histogram.cpp
index 2a34d2c..d33fcab 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -7,6 +7,13 @@ using namespace std;
 
 void find_minmax(const vector<double>& numbers, double& min, double& max)
 {
+    if (numbers.empty())
+        {
+            min = 0;
+            max = 0;
+            return;
+        }
+
     min = numbers[0];
     max = numbers[0];