diff --git a/contributors.md b/contributors.md
index 1828c803..c57235c6 100644
--- a/contributors.md
+++ b/contributors.md
@@ -1,11 +1,16 @@
-The following people have contributed to the development of jsPsych by writing code, documentation, and/or suggesting major improvements (in alphabetical order):
+The following people have contributed to the development of jsPsych by writing code, documentation, and/or suggesting improvements (in alphabetical order):
+* Xiaolu Bai - https://github.com/lbai001
 * Jason Carpenter
-* Josh de Leeuw - https://github.com/jodeleeuw
+* Steve Chao - https://github.com/stchao
 * Jana Klaus - https://github.com/janakl4us
 * Jonas Lambers
 * Shane Martin - https://github.com/shamrt
 * Adrian Oesch - https://github.com/adrianoesch
 * Junyan Qi - https://github.com/GavinQ1
+* Dan Rivas - https://github.com/rivasd
 * Marian Sauter - https://github.com/mariansauter
 * Tim Vergenz - https://github.com/vergenzt
+* Matteo Visconti di Oleggio Castello - https://github.com/mvdoc
+* Wolfgang Walther - https://github.com/wolfgangwalther
 * Erik Weitnauer - https://github.com/eweitnauer
+* Rob Wilkinson - https://github.com/RobAWilkinson