diff --git a/.travis.yml b/.travis.yml
index 6609f1a..06fbd30 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,6 +30,8 @@ env:
     - RACKET_VERSION=6.2
     - RACKET_VERSION=6.3
     - RACKET_VERSION=6.4
+    - RACKET_VERSION=6.5
+    - RACKET_VERSION=6.6
     - RACKET_VERSION=HEAD
 
 matrix: