diff --git a/Gemfile.lock b/Gemfile.lock
index 869cb54..0bdfec7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -414,6 +414,7 @@ DEPENDENCIES
   falcon (~> 0.48)
   http (~> 5.2)
   jwt (~> 2.10)
+  net-smtp (= 0.5.0)
   nokogiri (~> 1.18)
   openssl-oaep (~> 0.1.0)
   pg (~> 1.5)
diff --git a/backend/Gemfile b/backend/Gemfile
index 67ae79b..10d5dc1 100644
--- a/backend/Gemfile
+++ b/backend/Gemfile
@@ -94,4 +94,4 @@ gem "rails-i18n", "~> 8.0"
 
 gem "falcon", "~> 0.48"
 
-gem "net-smtp", "~> 0.5.0"
+gem "net-smtp", "= 0.5.0"
diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 15f341f..c1a65be 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -414,7 +414,7 @@ DEPENDENCIES
   falcon (~> 0.48)
   http (~> 5.2)
   jwt (~> 2.10)
-  net-smtp (~> 0.5.0)
+  net-smtp (= 0.5.0)
   nokogiri (~> 1.18)
   openssl-oaep (~> 0.1.0)
   pg (~> 1.5)