diff --git a/.travis.yml b/.travis.yml
index cdbe7d0..a27c5f5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 language: node_js
 sudo: false
 node_js:
+  - "6"
   - "5"
-  - "4"
 env:
   - CXX=g++-4.8
 branches:
diff --git a/README.md b/README.md
index bd97c64..fc49faa 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ sampleEachSecond(of(2))
   .take(3)
   .observe(([sec, val]) => {
     console.log('Seconds Passed: ' + sec);
-    console.log(sec * value);
+    console.log(sec * val);
   });
 // Seconds Passed: 0
 // 0