diff --git a/Gemfile b/Gemfile
index c9ba1d48..7b2cecb4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -66,7 +66,10 @@ gem "async-http", "~> 0.75.0", require: false
 gem "thread-local", "~> 1.1", require: false
 
 # For debugging.
-gem 'web-console', '~> 4.2', group: :development
+group :development do
+	gem 'debug', '~> 1.9.2'
+	gem 'web-console', '~> 4.2'
+end
 
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '~> 1.16', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 4adbd8f1..a0bb2148 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -134,6 +134,9 @@ GEM
     crass (1.0.6)
     csv (3.3.0)
     date (3.3.4)
+    debug (1.9.2)
+      irb (~> 1.10)
+      reline (>= 0.3.8)
     devise (4.9.4)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -521,6 +524,7 @@ DEPENDENCIES
   async (~> 2.17)
   async-http (~> 0.75.0)
   bootsnap (~> 1.16)
+  debug (~> 1.9.2)
   devise (~> 4.9, >= 4.9.2)
   devise-encryptable (~> 0.2.0)
   dotenv-rails (~> 2.8, >= 2.8.1)
diff --git a/vendor/cache/debug-1.9.2.gem b/vendor/cache/debug-1.9.2.gem
new file mode 100644
index 00000000..1bf70d22
Binary files /dev/null and b/vendor/cache/debug-1.9.2.gem differ