diff --git a/README.md b/README.md
index 2336ca3..ee914b0 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,8 @@ factory_girl was written by Joe Ferris with contributions from several authors,
 * Josh Nichols
 * Josh Owens
 * Nate Sutton
+* Josh Clayton
+* Thomas Walpole
 
 The syntax layers are derived from software written by the following authors: