diff --git a/build.sbt b/build.sbt
index b3129e1..b35e03c 100755
--- a/build.sbt
+++ b/build.sbt
@@ -17,11 +17,12 @@ addSbtJsEngine("1.3.5")
 addSbtWeb("1.5.3")
 
 libraryDependencies ++= Seq(
-  "org.webjars" % "less-node" % "2.7.2-1",
-  "org.webjars" % "mkdirp" % "0.5.0",
+  "org.webjars.npm" % "less" % "3.8.1",
+  "org.webjars.npm" % "clone" % "2.1.2",
+  "org.webjars.npm" % "mkdirp" % "0.5.6",
   "org.webjars.npm" % "clean-css" % "4.2.4",
   "org.webjars.npm" % "less-plugin-clean-css" % "1.5.1" intransitive(),
-  "org.webjars" % "es6-promise-node" % "4.2.8"
+  "org.webjars.npm" % "es6-promise" % "4.2.8"
 )
 
 // Customise sbt-dynver's behaviour to make it work with tags which aren't v-prefixed