diff --git a/.ruby-gemset b/.ruby-gemset
new file mode 100644
index 000000000..2cc173a20
--- /dev/null
+++ b/.ruby-gemset
@@ -0,0 +1 @@
+osem
diff --git a/.travis.yml b/.travis.yml
index 88c501896..5d7037408 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ dist: trusty
 language: ruby
 cache: bundler
 rvm:
-  - 2.4.0
+  - 2.4.0@osem --ignore-gemsets
 before_install:
   - "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"
   - "echo `phantomjs -v`"