1 files changed, 2 insertions, 1 deletions
diff --git a/DayFactory.cs b/DayFactory.cs
index 5938d75..0a05ecb 100644
--- a/DayFactory.cs
+++ b/DayFactory.cs
@@ -11,8 +11,9 @@ namespace aoc2019
                 case 1: return new Day1();
                 case 2: return new Day2();
                 case 3: return new Day3();
+                case 4: return new Day4();
                 default: return null;
             }
         }
     }
-}
\ No newline at end of file
+}