diff --git a/build.sbt b/build.sbt
index 230db20..751aee9 100644
--- a/build.sbt
+++ b/build.sbt
@@ -17,7 +17,7 @@ ThisBuild / scalaVersion := Scala213
 
 ThisBuild / testFrameworks += new TestFramework("munit.Framework")
 
-val catsV = "2.7.0"
+val catsV = "2.12.0"
 val catsEffectV = "3.3.14"
 val fs2V = "3.2.9"
 val http4sV = "0.23.11"