diff --git a/internal/2025/register.go b/internal/2025/register.go
index 50450be..1be53f3 100644
--- a/internal/2025/register.go
+++ b/internal/2025/register.go
@@ -1,6 +1,7 @@
 package year2025
 
 import (
+	_ "advent-of-code/internal/2025/DayFour"
 	_ "advent-of-code/internal/2025/DayOne"
 	_ "advent-of-code/internal/2025/DayThree"
 	_ "advent-of-code/internal/2025/DayTwo"