diff --git a/project/plugins.sbt b/project/plugins.sbt
index 8fadb58..eba534f 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -5,4 +5,4 @@ addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.1")
 
 // for reading npmDependencies from package.json
-libraryDependencies ++= Seq("com.lihaoyi" %% "upickle" % "3.3.1")
+libraryDependencies ++= Seq("com.lihaoyi" %% "upickle" % "4.0.0")