3 files changed, 5 insertions, 5 deletions
diff --git a/lib/axlsx/workbook/workbook.rb b/lib/axlsx/workbook/workbook.rb
index e6e2f06f..271d4300 100644
--- a/lib/axlsx/workbook/workbook.rb
+++ b/lib/axlsx/workbook/workbook.rb
@@ -197,7 +197,7 @@ module Axlsx
     # A helper to apply styles that were added using `worksheet.add_style`
     # @return [Boolean]
     def apply_styles
-      return false if !styled_cells
+      return false unless styled_cells
 
       styled_cells.each do |cell|
         current_style = styles.style_index[cell.style]
diff --git a/lib/axlsx/workbook/worksheet/border_creator.rb b/lib/axlsx/workbook/worksheet/border_creator.rb
index 9abaded5..04a9cfac 100644
--- a/lib/axlsx/workbook/worksheet/border_creator.rb
+++ b/lib/axlsx/workbook/worksheet/border_creator.rb
@@ -17,7 +17,7 @@ module Axlsx
       else
         @edges = @edges.map { |x| x&.to_sym }.uniq
 
-        if !(@edges - Axlsx::Border::EDGES).empty?
+        unless (@edges - Axlsx::Border::EDGES).empty?
           raise ArgumentError, "Invalid edges provided, #{edges}"
         end
       end
diff --git a/lib/axlsx/workbook/worksheet/worksheet.rb b/lib/axlsx/workbook/worksheet/worksheet.rb
index f2587edb..29a22db1 100644
--- a/lib/axlsx/workbook/worksheet/worksheet.rb
+++ b/lib/axlsx/workbook/worksheet/worksheet.rb
@@ -584,7 +584,7 @@ module Axlsx
     # @param [String|Array] cell_refs Cell references
     # @param [Hash] styles
     def add_style(cell_refs, *styles)
-      if !cell_refs.is_a?(Array)
+      unless cell_refs.is_a?(Array)
         cell_refs = [cell_refs]
       end
 
@@ -613,7 +613,7 @@ module Axlsx
         border_edges = options
       end
 
-      if !cell_refs.is_a?(Array)
+      unless cell_refs.is_a?(Array)
         cell_refs = [cell_refs]
       end
 
@@ -850,7 +850,7 @@ module Axlsx
     end
 
     def add_autofilter_defined_name_to_workbook
-      return if !auto_filter.range
+      return unless auto_filter.range
 
       workbook.add_defined_name auto_filter.defined_name, name: '_xlnm._FilterDatabase', local_sheet_id: index, hidden: 1
     end