diff --git a/Gemfile.lock b/Gemfile.lock
index 33a869b..df30351 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,9 +24,6 @@ GEM
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.3)
 
-PLATFORMS
-  x86_64-darwin-18
-
 DEPENDENCIES
   girocode!
   minitest