diff --git a/patchfile.gemspec b/patchfile.gemspec
index 0a757bc..185fe0d 100644
--- a/patchfile.gemspec
+++ b/patchfile.gemspec
@@ -23,11 +23,15 @@ end
 @file_text = File.read(dir_pwd+'/app/views/shared/_side_bar.html.erb').force_encoding('UTF-8')
 if !@file_text.include?('<div class="patchfile sub-nav-block icons-megaphone">')
 	@indert_index = @file_text.index('</nav>')
-	@file_text.insert(@indert_index , @patchfile_li_choices)
+  unless @indert_index.nil?
+	 @file_text.insert(@indert_index , @patchfile_li_choices)
+  end
 end
 if !@file_text.include?('patchfile_li')
 	@indert_index = @file_text.index('<li title="<%= t(\'site_info\') %>">')
-	@file_text.insert(@indert_index , @patchfile_li)
+  unless @indert_index.nil?
+	 @file_text.insert(@indert_index , @patchfile_li)
+  end
 end
 begin
     f = File.open(dir_pwd+'/app/views/shared/_side_bar.html.erb','w')