diff --git a/Gemfile.lock b/Gemfile.lock
index 520908c..c152345 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     vmfloaty (1.8.1)
-      commander (>= 4.4.3, < 4.7.0)
+      commander (>= 4.4.3, < 5.1.0)
       faraday (~> 1.5, >= 1.5.1)
 
 GEM
@@ -13,8 +13,8 @@ GEM
     ast (2.4.2)
     bigdecimal (3.1.6)
     coderay (1.1.3)
-    commander (4.6.0)
-      highline (~> 2.0.0)
+    commander (5.0.0)
+      highline (~> 3.0.0)
     crack (1.0.0)
       bigdecimal
       rexml
@@ -44,7 +44,7 @@ GEM
     faraday-rack (1.0.0)
     faraday-retry (1.0.3)
     hashdiff (1.1.0)
-    highline (2.0.3)
+    highline (3.0.1)
     json (2.7.1)
     language_server-protocol (3.17.0.3)
     method_source (1.0.0)
diff --git a/vmfloaty.gemspec b/vmfloaty.gemspec
index 184247b..1cf9fa7 100644
--- a/vmfloaty.gemspec
+++ b/vmfloaty.gemspec
@@ -21,6 +21,6 @@ Gem::Specification.new do |s|
   s.test_files = Dir['spec/**/*']
   s.require_path = 'lib'
 
-  s.add_dependency 'commander', '>= 4.4.3', '< 4.7.0'
+  s.add_dependency 'commander', '>= 4.4.3', '< 5.1.0'
   s.add_dependency 'faraday', '~> 1.5', '>= 1.5.1'
 end