diff --git a/.travis.yml b/.travis.yml
index 3d903ca..ec9bdcc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,9 @@ env:
    - RACKET_VERSION=6.1.1
    - RACKET_VERSION=6.2
    - RACKET_VERSION=6.2.1
+   - RACKET_VERSION=6.3
+   - RACKET_VERSION=6.4
+   - RACKET_VERSION=6.5
    - RACKET_VERSION=HEAD
 
 matrix: