diff --git a/Gemfile.lock b/Gemfile.lock
index 294af4b..c3d7b3e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,6 +43,8 @@ GEM
     ffi (1.15.5-java)
     google-cloud-env (1.6.0)
       faraday (>= 0.17.3, < 3.0)
+    json (2.6.3)
+    json (2.6.3-java)
     method_source (1.0.0)
     mock_redis (0.36.0)
       ruby2_keywords
@@ -90,7 +92,7 @@ GEM
     opentelemetry-semantic_conventions (1.8.0)
       opentelemetry-api (~> 1.0)
     parallel (1.22.1)
-    parser (3.2.1.0)
+    parser (3.2.2.0)
       ast (~> 2.4.1)
     pickup (0.0.11)
     prometheus-client (4.1.0)
@@ -128,18 +130,19 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
-    rubocop (1.28.2)
+    rubocop (1.50.1)
+      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)
-    rubocop-ast (1.27.0)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.28.0)
       parser (>= 3.2.1.0)
-    ruby-progressbar (1.12.0)
+    ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     simplecov (0.22.0)
       docile (~> 1.1)
@@ -176,7 +179,7 @@ DEPENDENCIES
   pry
   rack-test (>= 0.6)
   rspec (>= 3.2)
-  rubocop (~> 1.28.2)
+  rubocop (~> 1.50.1)
   simplecov (>= 0.11.2)
   thor (~> 1.0, >= 1.0.1)
   vmpooler!
diff --git a/lib/vmpooler/api/v3.rb b/lib/vmpooler/api/v3.rb
index 4e8f6e9..3b629dc 100644
--- a/lib/vmpooler/api/v3.rb
+++ b/lib/vmpooler/api/v3.rb
@@ -302,7 +302,7 @@ module Vmpooler
                 # Very simple filter for Litmus jobs - just count them coming through for the moment.
                 metrics.increment("usage_litmus.#{user}.#{operation}.#{poolname}")
               else
-                url_parts = jenkins_build_url.split('/')[2..-1]
+                url_parts = jenkins_build_url.split('/')[2..]
                 jenkins_instance = url_parts[0].gsub('.', '_')
                 value_stream_parts = url_parts[2].split('_')
                 value_stream_parts = value_stream_parts.map { |s| s.gsub('.', '_') }
diff --git a/vmpooler.gemspec b/vmpooler.gemspec
index 6e8d72e..6e93e3c 100644
--- a/vmpooler.gemspec
+++ b/vmpooler.gemspec
@@ -43,7 +43,7 @@ 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', '~> 1.28.2'
+  s.add_development_dependency 'rubocop', '~> 1.50.1'
   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'