diff --git a/build.sbt b/build.sbt
index c260aff..21e0922 100644
--- a/build.sbt
+++ b/build.sbt
@@ -27,7 +27,7 @@ val VaultVersion = "3.5.0"
 val DisciplineVersion = "1.1.5"
 val MunitVersion = "1.0.0-M10"
 val DisciplineMunitVersion = "2.0.0-M3"
-val MunitCatsEffectVersion = "2.0.0-M3"
+val MunitCatsEffectVersion = "2.0.0-M4"
 
 ThisBuild / scalacOptions ++= Seq("-new-syntax", "-no-indent", "-source:future")
 ThisBuild / Test / testOptions += Tests.Argument("+l")