diff --git a/.travis.yml b/.travis.yml
index b18cddc..e5a1b12 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,6 @@ rvm:
 - '2.3.3'
 - '2.2.6'
 - '2.1.10'
-- 'rbx-3.72'
 env:
   global:
     secure: GFgbyRIlAc93IyH5clByNGS9iI/5OSaa2Ba0iGemyLR93I80qxIUNgMvXzp74YTTbGTrWyz9JPBSD14uO/3tuPYhXuawbDT0k1D/97Xm7wMhxLXZNSEATKt71g3bk/106fy+ULz6aqzQWnLkGHsvfg3vlkdyn8rX/X1HstajrcI=