diff --git a/.travis.yml b/.travis.yml
index 68fbb3e..84aa6b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,6 +20,7 @@ env:
     # Supply more than one RACKET_VERSION (as in the example below) to
     # create a Travis-CI build matrix to test against multiple Racket
     # versions.
+    - RACKET_VERSION=6.3
     - RACKET_VERSION=6.4
     - RACKET_VERSION=6.5
     - RACKET_VERSION=6.6
diff --git a/scribblings/debug-scopes.scrbl b/scribblings/debug-scopes.scrbl
index 3e1b239..55f91bd 100644
--- a/scribblings/debug-scopes.scrbl
+++ b/scribblings/debug-scopes.scrbl
@@ -6,7 +6,7 @@
                     racket/contract]]
 
 @title{Debuging scope-related issues}
-@author{@author+email["Georges Dupéron" "georges.duperon@gmail.com"]}
+@author[@author+email["Georges Dupéron" "georges.duperon@gmail.com"]]
 
 @defmodule[debug-scopes]