diff --git a/.travis.yml b/.travis.yml
index 22ad348..72413b9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,8 @@ node_js:
   - "0.8"
   - "0.10"
   - "0.12"
-  - "iojs"
+  - "iojs-v1.8.4"
+  - "iojs-v2.5.0"
 before_install:
   - '[ "${TRAVIS_NODE_VERSION}" != "0.8" ] || npm install -g npm@1.4.28'
   - sudo chown -R $USER /usr/local