diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d4ca584..1ec61f6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,8 +16,6 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-        - '2.5'
-        - '2.6'
         - '2.7'
         - '3.0'
         - '3.1'
diff --git a/.rubocop.yml b/.rubocop.yml
index b239c83..c33a31e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -3,7 +3,7 @@ require:
 - rubocop-rspec
 
 AllCops:
-  TargetRubyVersion: '2.5'
+  TargetRubyVersion: '2.7'
   NewCops: enable
 
 Gemspec/RequireMFA:
diff --git a/lib/openvpn-status-web/parser/modern_stateless.rb b/lib/openvpn-status-web/parser/modern_stateless.rb
index 6861474..44b7617 100644
--- a/lib/openvpn-status-web/parser/modern_stateless.rb
+++ b/lib/openvpn-status-web/parser/modern_stateless.rb
@@ -13,10 +13,10 @@ module OpenVPNStatusWeb
 
         text.lines.each do |line|
           parts = line.strip.split(sep)
-          status.client_list_headers = parts[2..-1] if parts[0] == 'HEADER' && parts[1] == 'CLIENT_LIST'
-          status.client_list << parse_client(parts[1..-1], status.client_list_headers) if parts[0] == 'CLIENT_LIST'
-          status.routing_table_headers = parts[2..-1] if parts[0] == 'HEADER' && parts[1] == 'ROUTING_TABLE'
-          status.routing_table << parse_route(parts[1..-1], status.routing_table_headers) if parts[0] == 'ROUTING_TABLE'
+          status.client_list_headers = parts[2..] if parts[0] == 'HEADER' && parts[1] == 'CLIENT_LIST'
+          status.client_list << parse_client(parts[1..], status.client_list_headers) if parts[0] == 'CLIENT_LIST'
+          status.routing_table_headers = parts[2..] if parts[0] == 'HEADER' && parts[1] == 'ROUTING_TABLE'
+          status.routing_table << parse_route(parts[1..], status.routing_table_headers) if parts[0] == 'ROUTING_TABLE'
           status.global_stats << parse_global(parts[1..2]) if parts[0] == 'GLOBAL_STATS'
         end
 
diff --git a/lib/openvpn-status-web/parser/v1.rb b/lib/openvpn-status-web/parser/v1.rb
index f46ed9d..64580a4 100644
--- a/lib/openvpn-status-web/parser/v1.rb
+++ b/lib/openvpn-status-web/parser/v1.rb
@@ -27,9 +27,9 @@ module OpenVPNStatusWeb
 
         status = Status.new
         status.client_list_headers = ['Common Name', 'Real Address', 'Data Received', 'Data Sent', 'Connected Since']
-        status.client_list = client_list[2..-1].map { |client| parse_client(client) }
+        status.client_list = client_list[2..].map { |client| parse_client(client) }
         status.routing_table_headers = ['Virtual Address', 'Common Name', 'Real Address', 'Last Ref']
-        status.routing_table = routing_table[1..-1].map { |route| parse_route(route) }
+        status.routing_table = routing_table[1..].map { |route| parse_route(route) }
         status.global_stats = global_stats.map { |global| parse_global(global) }
         status
       end
diff --git a/openvpn-status-web.gemspec b/openvpn-status-web.gemspec
index cd77a49..f95ca1a 100644
--- a/openvpn-status-web.gemspec
+++ b/openvpn-status-web.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
   s.executables = ['openvpn-status-web']
   s.extra_rdoc_files = Dir['README.md', 'LICENSE']
 
-  s.required_ruby_version = '>= 2.5'
+  s.required_ruby_version = '>= 2.7'
 
   s.add_runtime_dependency 'metriks'
   s.add_runtime_dependency 'rack', '~> 2.0'