diff --git a/build.sbt b/build.sbt
index 2ec34580..cab6d985 100644
--- a/build.sbt
+++ b/build.sbt
@@ -51,7 +51,7 @@ val Version = new {
   val testInterface          = "1.0"
   val scalacCompatAnnotation = "0.1.4"
   val http4s                 = "0.23.26"
-  val munitDiff              = "1.3.1"
+  val munitDiff              = "1.3.3"
   val snapshot4s             = _root_.snapshot4s.BuildInfo.snapshot4sVersion
 }