diff --git a/Gemfile b/Gemfile
index af0f220..bb40704 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,7 +25,7 @@ gem "redis", ">= 4.0.1"
 # gem "kredis"
 
 # Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
-gem "bcrypt", "~> 3.1.7"
+gem "bcrypt", "~> 3.1.21"
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem "tzinfo-data", platforms: %i[ windows jruby ]
diff --git a/Gemfile.lock b/Gemfile.lock
index d6fb3f1..5e14fbc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,7 +79,7 @@ GEM
       public_suffix (>= 2.0.2, < 8.0)
     ast (2.4.3)
     base64 (0.3.0)
-    bcrypt (3.1.20)
+    bcrypt (3.1.21)
     bigdecimal (4.0.1)
     bindex (0.8.1)
     bootsnap (1.20.1)
@@ -343,7 +343,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  bcrypt (~> 3.1.7)
+  bcrypt (~> 3.1.21)
   bootsnap
   brakeman
   bundler-audit