diff --git a/backend-server/Gemfile b/backend-server/Gemfile
index ef4bfed..cff2d4e 100644
--- a/backend-server/Gemfile
+++ b/backend-server/Gemfile
@@ -14,7 +14,7 @@ gem 'rack-session', '>= 2.1.2'
 gem 'json', '~> 2.19', '>= 2.19.2'
 gem 'csv', '~> 3.2'
 gem 'pg', '~> 1.5', require: 'pg'
-gem 'redis', '~> 5.2'
+gem 'redis', '~> 6.0'
 
 # Security & Authentication
 gem 'bcrypt', '~> 3.1', '>= 3.1.22'
diff --git a/backend-server/Gemfile.lock b/backend-server/Gemfile.lock
index bfef740..b6b226e 100644
--- a/backend-server/Gemfile.lock
+++ b/backend-server/Gemfile.lock
@@ -48,9 +48,9 @@ GEM
       logger
       prism (>= 1.6.0)
       tsort
-    redis (5.4.1)
-      redis-client (>= 0.22.0)
-    redis-client (0.29.0)
+    redis (6.0.0)
+      redis-client (= 0.30.1)
+    redis-client (0.30.1)
       connection_pool
     reline (0.6.3)
       io-console (~> 0.5)
@@ -96,7 +96,7 @@ DEPENDENCIES
   rack-session (>= 2.1.2)
   rack-test (~> 2.1)
   rackup (~> 2.3)
-  redis (~> 5.2)
+  redis (~> 6.0)
   ruby-lsp (~> 0.14)
   securerandom
   sinatra (~> 4.0)
@@ -134,8 +134,8 @@ CHECKSUMS
   rack-test (2.2.0) sha256=005a36692c306ac0b4a9350355ee080fd09ddef1148a5f8b2ac636c720f5c463
   rackup (2.3.1) sha256=6c79c26753778e90983761d677a48937ee3192b3ffef6bc963c0950f94688868
   rbs (4.0.2) sha256=af75671e66cd03434cc546622741ebf83f6197ec4328375805306330bf78ef25
-  redis (5.4.1) sha256=b5e675b57ad22b15c9bcc765d5ac26f60b675408af916d31527af9bd5a81faae
-  redis-client (0.29.0) sha256=0c65bf1f8f6dca22063ddb085c0bb2054feef6f03a84869f4161b18a9a15bea3
+  redis (6.0.0) sha256=de71c10edd106986b759ec7ecdd08b63b9c0ee7414a0d0c1da73d31ba2bccda6
+  redis-client (0.30.1) sha256=5151bc5c7bbfe48623732cdae3b900d8a22dc691cc7cdfacfb351ac55116522d
   reline (0.6.3) sha256=1198b04973565b36ec0f11542ab3f5cfeeec34823f4e54cebde90968092b1835
   ruby-lsp (0.26.9) sha256=33a01c001c00a76b4e821efc04ed7572983430f31ca5d6f3e343d0b6ccab4129
   ruby2_keywords (0.0.5) sha256=ffd13740c573b7301cf7a2e61fc857b2a8e3d3aff32545d6f8300d8bae10e3ef