diff --git a/common/AoC.hs b/common/AoC.hs
index a954391..d039a14 100644
--- a/common/AoC.hs
+++ b/common/AoC.hs
@@ -7,7 +7,7 @@ module AoC
 where
 
 import Data.Function (on)
-import Data.List (groupBy, intercalate)
+import Data.List (groupBy)
 import Text.ParserCombinators.ReadP
 
 (.:) :: (c -> d) -> (a -> b -> c) -> a -> b -> d