diff --git a/Gemfile b/Gemfile
index 128edb5..fca0b10 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ end
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 7.1.3'
-gem 'bcrypt',         '3.1.11'
+gem 'bcrypt',         '3.1.22'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3', group: :development
 # 本番ではpostgressを使用する
diff --git a/Gemfile.lock b/Gemfile.lock
index 6f146c5..5cf4fa5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,7 +79,7 @@ GEM
       securerandom (>= 0.3)
       tzinfo (~> 2.0)
     base64 (0.3.0)
-    bcrypt (3.1.11)
+    bcrypt (3.1.22)
     benchmark (0.4.1)
     bigdecimal (3.2.2)
     bindex (0.8.1)
@@ -286,7 +286,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  bcrypt (= 3.1.11)
+  bcrypt (= 3.1.22)
   byebug
   coffee-rails (~> 4.2)
   jbuilder (~> 2.5)