diff --git a/.travis.yml b/.travis.yml
index 86eaa17..c8cc5a7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,8 @@
 language: julia
+os:
+  - linux
+  - osx
 julia:
-  - 0.4
   - 0.5
   - nightly
 notifications:
diff --git a/REQUIRE b/REQUIRE
index d5d6467..94237c0 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1 +1 @@
-julia 0.4
+julia 0.5