diff --git a/Gemfile.lock b/Gemfile.lock
index 6811abd..e6c8e34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,8 +81,8 @@ GEM
       opentelemetry-common (~> 0.17.0)
       opentelemetry-instrumentation-base (~> 0.17.0)
     optimist (3.0.1)
-    parallel (1.21.0)
-    parser (3.0.3.2)
+    parallel (1.22.1)
+    parser (3.1.2.0)
       ast (~> 2.4.1)
     pickup (0.0.11)
     prometheus-client (2.1.0)
@@ -104,7 +104,7 @@ GEM
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rainbow (3.0.0)
+    rainbow (3.1.1)
     rake (13.0.6)
     rbvmomi (3.0.0)
       builder (~> 3.2)
@@ -112,7 +112,7 @@ GEM
       nokogiri (~> 1.10)
       optimist (~> 3.0)
     redis (4.5.1)
-    regexp_parser (2.2.0)
+    regexp_parser (2.3.0)
     rexml (3.2.5)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
@@ -127,17 +127,17 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.3)
-    rubocop (1.1.0)
+    rubocop (1.28.1)
       parallel (~> 1.10)
-      parser (>= 2.7.1.5)
+      parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8)
+      regexp_parser (>= 1.8, < 3.0)
       rexml
-      rubocop-ast (>= 1.0.1)
+      rubocop-ast (>= 1.17.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (1.15.0)
-      parser (>= 3.0.1.1)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.17.0)
+      parser (>= 3.1.1.0)
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.5)
     simplecov (0.21.2)
@@ -159,7 +159,7 @@ GEM
     thor (1.1.0)
     thrift (0.15.0)
     tilt (2.0.10)
-    unicode-display_width (1.8.0)
+    unicode-display_width (2.1.0)
     vmpooler (2.1.0)
       concurrent-ruby (~> 1.1)
       connection_pool (~> 2.2)
@@ -194,7 +194,7 @@ DEPENDENCIES
   pry
   rack-test (>= 0.6)
   rspec (>= 3.2)
-  rubocop (~> 1.1.0)
+  rubocop (~> 1.28.1)
   simplecov (>= 0.11.2)
   thor (~> 1.0, >= 1.0.1)
   vmpooler (~> 2.1)
diff --git a/vmpooler-provider-vsphere.gemspec b/vmpooler-provider-vsphere.gemspec
index 6c7febe..9e0c9a4 100644
--- a/vmpooler-provider-vsphere.gemspec
+++ b/vmpooler-provider-vsphere.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'pry'
   s.add_development_dependency 'rack-test', '>= 0.6'
   s.add_development_dependency 'rspec', '>= 3.2'
-  s.add_development_dependency 'rubocop', '~> 1.1.0'
+  s.add_development_dependency 'rubocop', '~> 1.28.1'
   s.add_development_dependency 'simplecov', '>= 0.11.2'
   s.add_development_dependency 'thor', '~> 1.0', '>= 1.0.1'
   s.add_development_dependency 'yarjuf', '>= 2.0'