diff --git a/lib/cfonb/line_parser/base.rb b/lib/cfonb/line_parser/base.rb
index 2f23512..d0e3d4a 100644
--- a/lib/cfonb/line_parser/base.rb
+++ b/lib/cfonb/line_parser/base.rb
@@ -12,7 +12,7 @@ class Base
         ['bank', (2..6)],
         ['branch', (11..15)],
         ['currency', (16..18)],
-        ['scale', 19, proc { _1.to_i }],
+        ['scale', 19, proc { _1.to_i }], # rubocop:disable Style/SymbolProc
         ['account', (21..31)],
         ['date', (34..39), proc { |value, instance| instance.send(:parse_date, value) }],
       ].freeze
diff --git a/lib/cfonb/line_parser/operation.rb b/lib/cfonb/line_parser/operation.rb
index 0cd35ed..0d7d3fd 100644
--- a/lib/cfonb/line_parser/operation.rb
+++ b/lib/cfonb/line_parser/operation.rb
@@ -9,7 +9,7 @@ class Operation < Base
         ['rejection_code', (40..41)],
         ['value_date', (42..47), proc { |value, instance| instance.send(:parse_date, value) }],
         ['label', (48..79)],
-        ['number', (81..87), proc { _1.to_i }],
+        ['number', (81..87), proc { _1.to_i }], # rubocop:disable Style/SymbolProc
         ['exoneration_code', 88],
         ['unavailability_code', 89],
         ['reference', (104..119)],
diff --git a/spec/cfonb/operation_spec.rb b/spec/cfonb/operation_spec.rb
index 34fd0cb..36f854c 100644
--- a/spec/cfonb/operation_spec.rb
+++ b/spec/cfonb/operation_spec.rb
@@ -3,7 +3,6 @@
 require 'cfonb'
 require 'securerandom'
 require 'ostruct'
-require 'securerandom'
 
 describe CFONB::Operation do
   subject(:operation) { described_class.new(line) }