diff --git a/Gemfile b/Gemfile
index 8d100a8c..94e885a6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -56,9 +56,6 @@ gem 'rack-attack', '~> 6.7'
 # For testing emails in development.
 gem 'letter_opener', '~> 1.8', '>= 1.8.1', group: :development
 
-# For parallel API calls.
-gem 'parallel', '~> 1.23'
-
 # For miscellaneous HTTP requests.
 gem "addressable", "~> 2.8"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 98569e79..f4aed699 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -552,7 +552,6 @@ DEPENDENCIES
   omniauth (~> 2.1)
   omniauth-rails_csrf_protection (~> 1.0)
   omniauth_openid_connect (~> 0.7.1)
-  parallel (~> 1.23)
   protocol-rack (~> 0.10.0, < 0.11.0)
   rack-attack (~> 6.7)
   rack-mini-profiler (~> 3.1)