diff --git a/Gemfile.lock b/Gemfile.lock
index 6107df1..1b5b28b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,6 +13,8 @@ GEM
     connection_pool (2.4.1)
     hiredis (0.6.3)
     hiredis (0.6.3-java)
+    json (2.7.1)
+    json (2.7.1-java)
     minitest (5.21.2)
     parallel (1.24.0)
     parser (3.3.0.5)
@@ -27,15 +29,16 @@ GEM
     redis (4.6.0)
     regexp_parser (2.9.0)
     rexml (3.2.6)
-    rubocop (1.28.2)
+    rubocop (1.50.2)
+      json (~> 2.3)
       parallel (~> 1.10)
-      parser (>= 3.1.0.0)
+      parser (>= 3.2.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
-      rexml
-      rubocop-ast (>= 1.17.0, < 2.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.28.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
+      unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.30.0)
       parser (>= 3.2.1.0)
     rubocop-minitest (0.27.0)
diff --git a/test/redis_client_test.rb b/test/redis_client_test.rb
index 40aa98e..21490b3 100644
--- a/test/redis_client_test.rb
+++ b/test/redis_client_test.rb
@@ -153,13 +153,13 @@ def test_path
 
   def test_username
     username = "test"
-    client = new_client(**{ username: username })
+    client = new_client(username: username)
     assert_equal username, client.username
   end
 
   def test_password
     password = "test"
-    client = new_client(**{ password: password })
+    client = new_client(password: password)
     assert_equal password, client.password
   end