diff --git a/README.md b/README.md
index 534f7e0..e97cbd3 100644
--- a/README.md
+++ b/README.md
@@ -18,9 +18,10 @@ equal to Racket 6.0 should work. Racket releases can be downloaded
 
 Once you have Racket installed,
 
-    raco pkg install marketplace
+    raco pkg install marketplace bitsyntax
 
-to install Marketplace (note: will take a long time), and then
+to install Marketplace (note: will take a long time) and
+[bitsyntax](https://github.com/tonyg/racket-bitsyntax/), and then
 
     raco make driver.rkt proxy.rkt
 
diff --git a/codec.rkt b/codec.rkt
index e846580..efc148c 100644
--- a/codec.rkt
+++ b/codec.rkt
@@ -45,7 +45,7 @@
 
 (require racket/match)
 
-(require (planet tonyg/bitsyntax))
+(require bitsyntax)
 
 ;; An Opcode is a Symbol or a Number, one of the possibilities given
 ;; in the following define-mapping. It represents a DNS message
diff --git a/driver.rkt b/driver.rkt
index bc8e0ee..5aaa0f1 100644
--- a/driver.rkt
+++ b/driver.rkt
@@ -23,7 +23,7 @@
 (require racket/match)
 (require racket/set)
 (require racket/bool)
-(require (planet tonyg/bitsyntax))
+(require bitsyntax)
 (require "api.rkt")
 (require "codec.rkt")
 (require "zonedb.rkt")
diff --git a/proxy.rkt b/proxy.rkt
index fe66c3e..596f396 100644
--- a/proxy.rkt
+++ b/proxy.rkt
@@ -22,7 +22,7 @@
 (require racket/match)
 (require racket/set)
 (require racket/bool)
-(require (planet tonyg/bitsyntax))
+(require bitsyntax)
 (require "api.rkt")
 (require "codec.rkt")
 (require "zonedb.rkt")
diff --git a/zonedb.rkt b/zonedb.rkt
index 429368d..5d9dd35 100644
--- a/zonedb.rkt
+++ b/zonedb.rkt
@@ -24,7 +24,7 @@
 (require (only-in racket/math exact-floor exact-truncate))
 (require "api.rkt")
 (require "codec.rkt")
-(require (planet tonyg/bitsyntax))
+(require bitsyntax)
 (require (rename-in marketplace/tr-struct-copy [tr-struct-copy struct-copy])) ;; PR13149
 
 (provide CompiledZone