diff --git a/.travis.yml b/.travis.yml
index 36402c4..efa49c6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,12 @@
 language: julia
  
+ os:
+  - osx
+  - linux
+  - windows  
+julia:
+  - 1.4
+  
 beofre_script:
   - julia -e 'using Pkg; Pkg.add(PackageSpec(url="https://github.com/mathn7/TestOptinum.git"))'