diff --git a/typed-racket-lib/info.rkt b/typed-racket-lib/info.rkt
index 891a184d..6f25169e 100644
--- a/typed-racket-lib/info.rkt
+++ b/typed-racket-lib/info.rkt
@@ -2,7 +2,7 @@
 
 (define collection 'multi)
 
-(define deps '(("base" #:version "6.2.900.4")
+(define deps '(("base" #:version "6.2.900.6")
                "pconvert-lib"
                "unstable-contract-lib"
                "source-syntax"
diff --git a/typed-racket-lib/typed-racket/optimizer/logging.rkt b/typed-racket-lib/typed-racket/optimizer/logging.rkt
index 122b5c69..e17cb4a7 100644
--- a/typed-racket-lib/typed-racket/optimizer/logging.rkt
+++ b/typed-racket-lib/typed-racket/optimizer/logging.rkt
@@ -1,7 +1,7 @@
 #lang racket/base
 
 (require racket/string
-         unstable/syntax racket/logging syntax/parse
+         syntax/location racket/logging syntax/parse
          data/queue
          "../utils/tc-utils.rkt")