diff --git a/Gemfile b/Gemfile
index 2f43fb4c..63493654 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,6 +4,11 @@ gemspec
 gem 'rake', '~> 10.0'
 gem 'yard'
 gem 'rspec', '~> 3.8.0'
+
+# TODO: unlock version when the bug is fixed:
+# https://github.com/rspec/rspec-expectations/issues/1113
+gem 'rspec-expectations', '= 3.8.2'
+
 gem 'simplecov', '~> 0.16', require: false
 
 # Rubocop supports only >=2.2.0