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-rw-r--r--Gemfile1
1 files changed, 1 insertions, 0 deletions
diff --git a/Gemfile b/Gemfile
index 042db3a55..3949c0f4d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,6 +9,7 @@ gem 'puma', '~> 4.3'
 gem 'rails', '~> 5.2.4'
 gem 'sprockets', '~> 3.7.2'
 gem 'thor', '~> 0.20'
+gem 'rack', '2.0.8'
 
 gem 'thwait', '~> 0.1.0'
 gem 'e2mmap', '~> 0.1.0'