diff --git a/Gemfile b/Gemfile
index cd724bc..0026ace 100644
--- a/Gemfile
+++ b/Gemfile
@@ -21,6 +21,7 @@ gem 'github_webhook'
 gem 'haml'
 gem 'jbuilder'
 gem 'jwt'
+gem 'net-http' # needed to remove warnings about already-defined constants on Ruby 2.7
 gem 'octokit'
 gem 'omniauth-github'
 gem 'omniauth-rails_csrf_protection'
diff --git a/Gemfile.lock b/Gemfile.lock
index b4510c6..cabdd5c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -179,6 +179,8 @@ GEM
     msgpack (1.7.0)
     multi_xml (0.6.0)
     multipart-post (2.3.0)
+    net-http (0.3.2)
+      uri
     net-imap (0.3.4)
       date
       net-protocol
@@ -332,6 +334,7 @@ GEM
     timeout (0.3.2)
     tzinfo (1.2.11)
       thread_safe (~> 0.1)
+    uri (0.12.1)
     version_gem (1.1.2)
     vite_rails (3.0.14)
       railties (>= 5.1, < 8)
@@ -383,6 +386,7 @@ DEPENDENCIES
   jbuilder
   jwt
   listen
+  net-http
   octokit
   omniauth-github
   omniauth-rails_csrf_protection