diff --git a/.travis.yml b/.travis.yml
index d3c04e1..a2be591 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,3 +22,4 @@ cache:
   - $HOME/.ivy2/cache
   - $HOME/.sbt/boot
   - $HOME/.sbt/launchers
+  - $HOME/.cache/coursier
diff --git a/project/build.properties b/project/build.properties
index a919a9b..f0be67b 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.3.8
+sbt.version=1.5.1