diff --git a/build.sbt b/build.sbt
index 48df16af..53f58f06 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,6 +2,8 @@ name := "eventsim"
 
 version := "1.0"
 
+scalaVersion := "2.10.4"
+
 libraryDependencies += "org.apache.commons" % "commons-math3" % "3.5"
 
 libraryDependencies += "de.jollyday" % "jollyday" % "0.5.1"
diff --git a/project/build.properties b/project/build.properties
new file mode 100644
index 00000000..50752896
--- /dev/null
+++ b/project/build.properties
@@ -0,0 +1 @@
+sbt.version=0.13.5
\ No newline at end of file