diff --git a/pkgs/parser-tools-pkgs/parser-tools-doc/info.rkt b/pkgs/parser-tools-pkgs/parser-tools-doc/info.rkt
index 8dee67b..a9c1254 100644
--- a/pkgs/parser-tools-pkgs/parser-tools-doc/info.rkt
+++ b/pkgs/parser-tools-pkgs/parser-tools-doc/info.rkt
@@ -7,6 +7,7 @@
                      "syntax-color-doc"
                      "parser-tools-lib"
                      "scribble-lib"))
+(define update-implies '("parser-tools-lib"))
 
 (define pkg-desc "documentation part of \"parser-tools\"")