diff --git a/.travis.yml b/.travis.yml
index 0e9d179..eacde66 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: go
 
 go:
-  - 1.2
+  - 1.4.2
   - tip
 
 install:
diff --git a/pop3d/handler.go b/pop3d/handler.go
index 6d7beb0..46ee2da 100644
--- a/pop3d/handler.go
+++ b/pop3d/handler.go
@@ -507,7 +507,7 @@ func (ses *Session) loadMailbox() {
 // Reset retain flag to true for all messages
 func (ses *Session) retainAll() {
 	ses.retain = make([]bool, len(ses.messages))
-	for i, _ := range ses.retain {
+	for i := range ses.retain {
 		ses.retain[i] = true
 	}
 	ses.msgCount = len(ses.messages)