diff --git a/Gemfile.lock b/Gemfile.lock
index 52a5fb8..e7635f8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,7 @@ GEM
     simplecov_json_formatter (0.1.4)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode-display_width (2.5.0)
+    unicode-display_width (2.6.0)
 
 PLATFORMS
   ruby
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 4220468..2986665 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -13,7 +13,10 @@
   SimpleCov::Formatter::LcovFormatter,
 ])
 
-SimpleCov.start
+SimpleCov.start do
+  enable_coverage(:branch)
+  minimum_coverage(line: 100, branch: 100)
+end
 
 require "memery"
 require "active_support/concern"