diff --git a/bingo/__init__.py b/bingo/__init__.py
index bfea606..2ec7c9b 100644
--- a/bingo/__init__.py
+++ b/bingo/__init__.py
@@ -32,6 +32,8 @@ class Board:
                     self.called[col][row] = True
 
     def has_bingo(self):
+        all_diag1 = True
+        all_diag2 = True
         for i in range(5):
             all_col = True
             all_row = True
@@ -42,3 +44,10 @@ class Board:
                     all_row = False
             if all_col or all_row:
                 return True
+            if not self.called[i][i]:
+                all_diag1 = False
+            if not self.called[i][4 - i]:
+                all_diag2 = False
+        if all_diag1 or all_diag2:
+            return True
+        return False