diff --git a/cancerpredict.gemspec b/cancerpredict.gemspec
index 4273662..ca6de2f 100644
--- a/cancerpredict.gemspec
+++ b/cancerpredict.gemspec
@@ -33,10 +33,11 @@ all_template.each do |folder|
 		texts = File.read(folder+'partial/_head.html.erb')
 		insert_flag = 0
 		if texts.include?(check_texts)
-			texts.gsub(check_texts,edit_texts)
+			texts = texts.gsub(check_texts,edit_texts)
 			insert_flag = 1
 		end
 		if insert_flag == 1
+			puts 'editing _head.html.erb'
 			f = File.open(folder+'partial/_head.html.erb','w')
 			f.write(texts)
 			f.close