1 files changed, 2 insertions, 2 deletions
diff --git a/lib/axlsx/stylesheet/styles.rb b/lib/axlsx/stylesheet/styles.rb
index e518d21e..6356d9e6 100644
--- a/lib/axlsx/stylesheet/styles.rb
+++ b/lib/axlsx/stylesheet/styles.rb
@@ -381,7 +381,7 @@ module Axlsx
       end
 
       validate_border_hash = ->(val) {
-        if !(val.key?(:style) && val.key?(:color))
+        unless val.key?(:style) && val.key?(:color)
           raise ArgumentError, (ERR_INVALID_BORDER_OPTIONS % options[:border])
         end
       }
@@ -439,7 +439,7 @@ module Axlsx
           next
         end
 
-        if !edge_b_opts.empty?
+        unless edge_b_opts.empty?
           if base_border_opts.empty?
             validate_border_hash.call(edge_b_opts)
           end