diff --git a/spec/dummy/config/boot.rb b/spec/dummy/config/boot.rb
index a42c1800f..2c9af1a7a 100644
--- a/spec/dummy/config/boot.rb
+++ b/spec/dummy/config/boot.rb
@@ -7,4 +7,6 @@
   Bundler.setup
 end
 
-$:.unshift File.expand_path('../../../lib', __dir__)
\ No newline at end of file
+$:.unshift File.expand_path('../../../lib', __dir__)
+
+require 'logger' # Fix concurrent-ruby removing logger dependency which Rails itself does not have