diff --git a/2021/nim/day25.nim b/2021/nim/day25.nim
index 4b23dd4..040afc2 100644
--- a/2021/nim/day25.nim
+++ b/2021/nim/day25.nim
@@ -1,4 +1,4 @@
-import ./common, std/[strutils, hashes, sugar, strformat]
+import ./common, std/[strutils, hashes, sugar]
 
 proc p1(input: Lines): uint64 =
   var h = input.len