diff --git a/build.sbt b/build.sbt
index 1573fec..70f8f61 100644
--- a/build.sbt
+++ b/build.sbt
@@ -27,7 +27,7 @@ lazy val root = project
   .settings(
     organization := "com.horothesun",
     name := "advent-of-code-2024",
-    scalaVersion := "3.7.2",
+    scalaVersion := "3.7.3",
     libraryDependencies ++= Seq(
       "org.typelevel" %% "cats-core" % catsVersion,
       "org.typelevel" %% "kittens" % kittensVersion,
diff --git a/src/main/scala/Day02.scala b/src/main/scala/Day02.scala
index c58c9f6..62410e9 100644
--- a/src/main/scala/Day02.scala
+++ b/src/main/scala/Day02.scala
@@ -42,12 +42,12 @@ object Day02:
       case _ :: tail      => ls.zip(tail).forall((l, r) => l.differsFrom(min = 1, max = 3)(r))
 
     def safety(ls: List[Level]): Safety =
-      if ((isAllIncreasing(ls) || isAllDecreasing(ls)) && areAllDeltasBetween1And3(ls)) Safe else Unsafe
+      if (isAllIncreasing(ls) || isAllDecreasing(ls)) && areAllDeltasBetween1And3(ls) then Safe else Unsafe
 
   extension [A](nel: NonEmptyList[A])
     def removed(elementAt: Int): List[A] =
       val as = nel.toList
-      if (elementAt < 0 || nel.length <= elementAt) as
+      if elementAt < 0 || nel.length <= elementAt then as
       else // 0 <= idx && idx < nel.length
         as.take(elementAt) ++ as.drop(1 + elementAt)