diff --git a/.ruby-version b/.ruby-version
index b0f2dcb3..ef538c28 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.0.4
+3.1.2
diff --git a/Gemfile b/Gemfile
index 75e2ce6e..4457b8bf 100644
--- a/Gemfile
+++ b/Gemfile
@@ -109,3 +109,5 @@ end
 gem "webpacker", "~> 5.2"
 
 gem "omniauth-rails_csrf_protection", "~> 1.0"
+
+gem "net-smtp"
diff --git a/Gemfile.lock b/Gemfile.lock
index df941d4b..3fc78635 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -312,6 +312,7 @@ GEM
     naught (1.1.0)
     nenv (0.3.0)
     nested_form (0.3.2)
+    net-smtp (0.1.0)
     nio4r (2.5.8)
     nokogiri (1.13.7)
       mini_portile2 (~> 2.8.0)
@@ -606,6 +607,7 @@ DEPENDENCIES
   letter_opener
   lograge
   mini_magick
+  net-smtp
   oj
   omniauth
   omniauth-rails_csrf_protection (~> 1.0)