diff --git a/argonaut/build.sbt b/argonaut/build.sbt
index 0292f8f..964d75b 100644
--- a/argonaut/build.sbt
+++ b/argonaut/build.sbt
@@ -3,5 +3,5 @@ name := "scalatest-argonaut"
 libraryDependencies ++= Seq(
   "org.scalatest" %% "scalatest" % "3.2.9",
   "io.argonaut" %% "argonaut" % "6.3.6",
-  "com.softwaremill.diffx" %% "diffx-core" % "0.5.3"
+  "com.softwaremill.diffx" %% "diffx-core" % "0.5.6"
 )