diff --git a/.gitignore b/.gitignore
index 1b47766c..cf0feff8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ articles/*.html
 # articles/*.md
 articles/*.xml
 articles/*.txt
+articles/_refiles/
\ No newline at end of file
diff --git a/Gruntfile.js b/Gruntfile.js
index 4e2e6088..8efde0a4 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -40,7 +40,7 @@ module.exports = grunt => {
 						cwd: articles,
 					}
 				},
-				command: `${reviewPreproc} -r --tabwidth=2 ${reviewContentDir}/*.re`
+				command: `${reviewContentDir === '_refiles' ? "echo 'skip preprocess'" : `${reviewPreproc} -r --tabwidth=2 ${reviewContentDir}/*.re`}`
 			},
 			compile2text: {
 				options: {
diff --git a/articles/lib/tasks/z01_pandoc2review.rake b/articles/lib/tasks/z01_pandoc2review.rake
index ff7b0243..83ba9dcd 100644
--- a/articles/lib/tasks/z01_pandoc2review.rake
+++ b/articles/lib/tasks/z01_pandoc2review.rake
@@ -28,6 +28,7 @@ def make_mdre(ch, p2r, path)
   elsif File.exist?(ch.sub(/\.re\Z/, '.md')) # md file
     system("#{p2r} #{ch.sub(/\.re\Z/, '.md')} > #{path}/#{ch}")
   end
+  sh "review-preproc -r --tabwidth=2 #{File.join(path, ch)}"
 end
 
 def yaml_load_file_compatible(file)