diff --git a/build.sbt b/build.sbt
index eead259e..f596775c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -28,7 +28,7 @@ lazy val `rho-core` = project
         case _ => Nil
       }
     },
-    libraryDependencies ++= Seq("org.scala-lang.modules" %% "scala-collection-compat" % "2.1.5")
+    libraryDependencies ++= Seq("org.scala-lang.modules" %% "scala-collection-compat" % "2.1.6")
   ): _*)
 
 lazy val `rho-hal` = project