diff --git a/beautiful-racket-demo/info.rkt b/beautiful-racket-demo/info.rkt
index b3e3be4..e28551a 100644
--- a/beautiful-racket-demo/info.rkt
+++ b/beautiful-racket-demo/info.rkt
@@ -7,7 +7,7 @@
 
 (define version "1.5")
 
-(define deps '(["base" #:version "6.7"]
+(define deps '(["base" #:version "6.6.0.900"]
                "sugar"
                "beautiful-racket-lib"
                "rackunit-lib"
diff --git a/beautiful-racket-lib/info.rkt b/beautiful-racket-lib/info.rkt
index 1bee89d..f13df9b 100644
--- a/beautiful-racket-lib/info.rkt
+++ b/beautiful-racket-lib/info.rkt
@@ -4,7 +4,7 @@
 
 (define version "1.5")
 
-(define deps '(["base" #:version "6.7"]
+(define deps '(["base" #:version "6.6.0.900"]
                "at-exp-lib"
                "sugar"
                "debug"
diff --git a/beautiful-racket/info.rkt b/beautiful-racket/info.rkt
index 8ff2c74..089ee04 100644
--- a/beautiful-racket/info.rkt
+++ b/beautiful-racket/info.rkt
@@ -3,7 +3,7 @@
 
 (define version "1.5")
 
-(define deps '(["base" #:version "6.7"]
+(define deps '(["base" #:version "6.6.0.900"]
                "beautiful-racket-lib"
                "beautiful-racket-demo"))