diff --git a/tasks/tcardgen.rake b/tasks/tcardgen.rake
index 25ec46a..2665b88 100644
--- a/tasks/tcardgen.rake
+++ b/tasks/tcardgen.rake
@@ -3,5 +3,13 @@
 desc 'Generate OGP images'
 task :tcard do
   sh 'find static/ogp/ -type f -name "*.png" | grep -v "base.png" | xargs -t --no-run-if-empty rm'
-  sh 'find content/ -type f -name "*.md" | xargs -t -I % tcardgen -f ~/repo/sample-font/ -o static/ogp/ -c config/tcardgen.yaml %'
+
+  Dir.glob("**/*.md", File::FNM_DOTMATCH, base: 'content/').each do |article|
+    unless article =~ /_index\.md/
+      target = File.join('content', article)
+      sh "tcardgen -f ~/repo/sample-font/ -o static/ogp/ -c config/tcardgen.yaml #{target}"
+    end
+  end
+
+  #sh 'find content/ -type f -name "*.md" | xargs -t -I % tcardgen -f ~/repo/sample-font/ -o static/ogp/ -c config/tcardgen.yaml %'
 end