--- a/Gemfile
+++ b/Gemfile
@@ -399,7 +399,7 @@
 # Locked until https://github.com/google/protobuf/issues/4210 is closed
 gem 'google-protobuf', '= 3.5.1'
 
-gem 'toml-rb', '~> 0.3.15', require: false
+gem 'toml-rb', '>= 0.3.15', require: false
 
 # Feature toggles
 gem 'flipper', '~> 0.11.0'