diff --git a/.travis.yml b/.travis.yml
index 00d0f06e..cf1b9701 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: node_js
 node_js:
+  - 0.4
   - 0.6
   - 0.7
 
diff --git a/package.json b/package.json
index d0b58fe0..80a89d36 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
         "nodeunit": "*"
     },
     "engine": {
-        "node": ">=0.5"
+        "node": ">=0.4"
     },
     "keywords": ["e-mail", "mime", "email", "sendmail", "ses"]
 }
\ No newline at end of file