diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 568ce2739..d97d05ac3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.5, 2.6, 2.7, "3.0"]
+        ruby: [2.6, 2.7, "3.0", 3.1]
     services:
       redis:
         image: redis
diff --git a/Gemfile b/Gemfile
index f989c7fac..cd9aa9fc9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,3 +22,7 @@ group :load_test do
   gem "hiredis"
   gem "toxiproxy"
 end
+
+gem "net-smtp", require: false
+gem "net-imap", require: false
+gem "net-pop", require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 0dc00fb51..cbaba846a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,16 +81,18 @@ GEM
     codecov (0.2.8)
       json
       simplecov
-    concurrent-ruby (1.1.8)
+    concurrent-ruby (1.1.9)
     connection_pool (2.2.5)
     crass (1.0.6)
+    digest (3.1.0)
     docile (1.3.2)
     erubi (1.10.0)
-    globalid (0.4.2)
-      activesupport (>= 4.2.0)
+    globalid (1.0.0)
+      activesupport (>= 5.0)
     hiredis (0.6.3)
-    i18n (1.8.10)
+    i18n (1.8.11)
       concurrent-ruby (~> 1.0)
+    io-wait (0.2.1)
     json (2.3.1)
     loofah (2.9.0)
       crass (~> 1.0.2)
@@ -101,7 +103,22 @@ GEM
     method_source (1.0.0)
     mini_mime (1.0.3)
     mini_portile2 (2.5.0)
-    minitest (5.14.4)
+    minitest (5.15.0)
+    net-imap (0.2.3)
+      digest
+      net-protocol
+      strscan
+    net-pop (0.1.1)
+      digest
+      net-protocol
+      timeout
+    net-protocol (0.1.2)
+      io-wait
+      timeout
+    net-smtp (0.3.1)
+      digest
+      net-protocol
+      timeout
     nio4r (2.5.7)
     nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
@@ -174,7 +191,9 @@ GEM
     standard (1.6.0)
       rubocop (= 1.24.1)
       rubocop-performance (= 1.13.1)
+    strscan (3.0.1)
     thor (1.1.0)
+    timeout (0.2.0)
     toxiproxy (1.0.3)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
@@ -182,7 +201,7 @@ GEM
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    zeitwerk (2.4.2)
+    zeitwerk (2.5.3)
 
 PLATFORMS
   ruby
@@ -192,6 +211,9 @@ DEPENDENCIES
   codecov
   hiredis
   minitest
+  net-imap
+  net-pop
+  net-smtp
   rails (>= 6.0.2)
   rake
   redis-namespace!
@@ -200,3 +222,6 @@ DEPENDENCIES
   sqlite3
   standard
   toxiproxy
+
+BUNDLED WITH
+   2.3.4