diff --git a/Rakefile b/Rakefile
index 444ff67..9d06eec 100644
--- a/Rakefile
+++ b/Rakefile
@@ -21,4 +21,4 @@ end
 
 task default: [:rubocop, :spec, 'bundle:audit']
 
-task travis: [:default, :'solargraph:tc']
+task travis: [:default, :'solargraph:init', :'solargraph:tc']
diff --git a/lib/dyndnsd.rb b/lib/dyndnsd.rb
index 8dccb4f..9d2c482 100644
--- a/lib/dyndnsd.rb
+++ b/lib/dyndnsd.rb
@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require 'date'
 require 'etc'
 require 'logger'
 require 'ipaddr'
@@ -80,7 +81,7 @@ module Dyndnsd
     end
 
     # @param env [Hash{String => String}]
-    # @return [Array{Integer,Hash{String => String},Array{String}}]
+    # @return [Array{Integer,Hash{String => String},Array<String>}]
     def call(env)
       return [422, {'X-DynDNS-Response' => 'method_forbidden'}, []] if env['REQUEST_METHOD'] != 'GET'
       return [422, {'X-DynDNS-Response' => 'not_found'}, []] if env['PATH_INFO'] != '/nic/update'
@@ -134,7 +135,7 @@ module Dyndnsd
     private
 
     # @param params [Hash{String => String}]
-    # @return [Array{String}]
+    # @return [Array<String>]
     def extract_v4_and_v6_address(params)
       return [] if !(params['myip'])
       begin
@@ -148,7 +149,7 @@ module Dyndnsd
 
     # @param env [Hash{String => String}]
     # @param params [Hash{String => String}]
-    # @return [Array{String}]
+    # @return [Array<String>]
     def extract_myips(env, params)
       # require presence of myip parameter as valid IPAddr (v4) and valid myip6
       return extract_v4_and_v6_address(params) if params.key?('myip6')
@@ -164,8 +165,8 @@ module Dyndnsd
     end
 
     # @param hostnames [String]
-    # @param myips [Array{String}]
-    # @return [Array{Symbol}]
+    # @param myips [Array<String>]
+    # @return [Array<Symbol>]
     def process_changes(hostnames, myips)
       changes = []
       Helper.span('process_changes') do |span|
@@ -200,7 +201,7 @@ module Dyndnsd
     end
 
     # @param env [Hash{String => String}]
-    # @return [Array{Integer,Hash{String => String},Array{String}}]
+    # @return [Array{Integer,Hash{String => String},Array<String>}]
     def handle_dyndns_request(env)
       params = Rack::Utils.parse_query(env['QUERY_STRING'])
 
diff --git a/lib/dyndnsd/responder/dyndns_style.rb b/lib/dyndnsd/responder/dyndns_style.rb
index 1a4f514..8a9276f 100644
--- a/lib/dyndnsd/responder/dyndns_style.rb
+++ b/lib/dyndnsd/responder/dyndns_style.rb
@@ -9,7 +9,7 @@ module Dyndnsd
       end
 
       # @param env [Hash{String => String}]
-      # @return [Array{Integer,Hash{String => String},Array{String}}]
+      # @return [Array{Integer,Hash{String => String},Array<String>}]
       def call(env)
         @app.call(env).tap do |status_code, headers, body|
           if headers.key?('X-DynDNS-Response')
@@ -24,8 +24,8 @@ module Dyndnsd
 
       # @param status_code [Integer]
       # @param headers [Hash{String => String}]
-      # @param body [Array{String}]
-      # @return [Array{Integer,Hash{String => String},Array{String}}]
+      # @param body [Array<String>]
+      # @return [Array{Integer,Hash{String => String},Array<String>}]
       def decorate_dyndnsd_response(status_code, headers, body)
         case status_code
         when 200
@@ -37,8 +37,8 @@ module Dyndnsd
 
       # @param status_code [Integer]
       # @param headers [Hash{String => String}]
-      # @param _body [Array{String}]
-      # @return [Array{Integer,Hash{String => String},Array{String}}]
+      # @param _body [Array<String>]
+      # @return [Array{Integer,Hash{String => String},Array<String>}]
       def decorate_other_response(status_code, headers, _body)
         case status_code
         when 400
@@ -48,8 +48,8 @@ module Dyndnsd
         end
       end
 
-      # @param changes [Array{Symbol}]
-      # @param myips [Array{String}]
+      # @param changes [Array<Symbol>]
+      # @param myips [Array<String>]
       # @return [String]
       def get_success_body(changes, myips)
         changes.map { |change| "#{change} #{myips.join(' ')}" }.join("\n")
diff --git a/lib/dyndnsd/responder/rest_style.rb b/lib/dyndnsd/responder/rest_style.rb
index 8687259..ef0c54a 100644
--- a/lib/dyndnsd/responder/rest_style.rb
+++ b/lib/dyndnsd/responder/rest_style.rb
@@ -9,7 +9,7 @@ module Dyndnsd
       end
 
       # @param env [Hash{String => String}]
-      # @return [Array{Integer,Hash{String => String},Array{String}}]
+      # @return [Array{Integer,Hash{String => String},Array<String>}]
       def call(env)
         @app.call(env).tap do |status_code, headers, body|
           if headers.key?('X-DynDNS-Response')
@@ -24,8 +24,8 @@ module Dyndnsd
 
       # @param status_code [Integer]
       # @param headers [Hash{String => String}]
-      # @param body [Array{String}]
-      # @return [Array{Integer,Hash{String => String},Array{String}}]
+      # @param body [Array<String>]
+      # @return [Array{Integer,Hash{String => String},Array<String>}]
       def decorate_dyndnsd_response(status_code, headers, body)
         case status_code
         when 200
@@ -37,8 +37,8 @@ module Dyndnsd
 
       # @param status_code [Integer]
       # @param headers [Hash{String => String}]
-      # @param _body [Array{String}]
-      # @return [Array{Integer,Hash{String => String},Array{String}}]
+      # @param _body [Array<String>]
+      # @return [Array{Integer,Hash{String => String},Array<String>}]
       def decorate_other_response(status_code, headers, _body)
         case status_code
         when 400
@@ -48,8 +48,8 @@ module Dyndnsd
         end
       end
 
-      # @param changes [Array{Symbol}]
-      # @param myips [Array{String}]
+      # @param changes [Array<Symbol>]
+      # @param myips [Array<String>]
       # @return [String]
       def get_success_body(changes, myips)
         changes.map { |change| change == :good ? "Changed to #{myips.join(' ')}" : "No change needed for #{myips.join(' ')}" }.join("\n")
diff --git a/lib/dyndnsd/textfile_reporter.rb b/lib/dyndnsd/textfile_reporter.rb
index e8842df..857e421 100644
--- a/lib/dyndnsd/textfile_reporter.rb
+++ b/lib/dyndnsd/textfile_reporter.rb
@@ -94,8 +94,8 @@ module Dyndnsd
     # @param file [String]
     # @param base_name [String]
     # @param metric [Object]
-    # @param keys [Array{Symbol}]
-    # @param snapshot_keys [Array{Symbol}]
+    # @param keys [Array<Symbol>]
+    # @param snapshot_keys [Array<Symbol>]
     # @return [void]
     def write_metric(file, base_name, metric, keys, snapshot_keys = [])
       time = Time.now.to_i
diff --git a/lib/dyndnsd/updater/zone_transfer_server.rb b/lib/dyndnsd/updater/zone_transfer_server.rb
index a38b73e..2f886c0 100644
--- a/lib/dyndnsd/updater/zone_transfer_server.rb
+++ b/lib/dyndnsd/updater/zone_transfer_server.rb
@@ -85,7 +85,7 @@ module Dyndnsd
 
       # converts into suitable parameter form for Async::DNS::Resolver or Async::DNS::Server
       #
-      # @param endpoint_list [Array{String}]
+      # @param endpoint_list [Array<String>]
       # @return [Array{Array{Object}}]
       def self.parse_endpoints(endpoint_list)
         endpoint_list.map { |addr_string| addr_string.split('@') }