diff --git a/hyphenate/.travis.yml b/hyphenate/.travis.yml
index 52e75ded..11441add 100644
--- a/hyphenate/.travis.yml
+++ b/hyphenate/.travis.yml
@@ -14,6 +14,8 @@ env:
     - RACKET_VERSION=6.2
     - RACKET_VERSION=6.3
     - RACKET_VERSION=6.4
+    - RACKET_VERSION=6.5
+    - RACKET_VERSION=6.6
     - RACKET_VERSION=HEAD
 
 # You may want to test against certain versions of Racket, without