diff --git a/build.sbt b/build.sbt
index bc08345..bd87b60 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ organization := "com.github.kmizu"
 
 name := "scomb"
 
-scalaVersion := "2.12.3"
+scalaVersion := "2.12.4"
 
 publishMavenStyle := true