diff --git a/build.sbt b/build.sbt
index 71e3a8e..de75a17 100644
--- a/build.sbt
+++ b/build.sbt
@@ -20,7 +20,7 @@ lazy val commonSettings = Seq(
   libraryDependencies ++= {
     Seq(
       "org.scalatest" %% "scalatest" % "3.2.11" % Test,
-      "org.scalaz" %% "scalaz-core" % "7.4.0-M7" % Test
+      "org.scalaz" %% "scalaz-core" % "7.4.0-M12" % Test
     )
   },
   pomExtra := <scm>