diff --git a/build.sbt b/build.sbt
index 7fcff54a..f3e86f85 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,5 +1,5 @@
 lazy val commonSettings = Seq(
-  scalaVersion := "2.11.8",
+  scalaVersion := "2.11.9",
   dexMaxHeap := "4g",
 
   organization := "com.github.shadowsocks",
diff --git a/project/plugins.sbt b/project/plugins.sbt
index f48545c8..2bf0931c 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,4 @@
-addSbtPlugin("org.scala-android" % "sbt-android" % "1.7.6")
+addSbtPlugin("org.scala-android" % "sbt-android" % "1.7.7")
 
 addSbtPlugin("com.timushev.sbt" % "sbt-updates" % "0.1.10")