diff --git a/.listfilter b/.listfilter
new file mode 100644
index 0000000..ef780bb
--- /dev/null
+++ b/.listfilter
@@ -0,0 +1 @@
+^61b8ae9e91048c7a96ddc63cbc7f0f006b52ea6d
diff --git a/Makefile b/Makefile
index c82e577..3992efe 100644
--- a/Makefile
+++ b/Makefile
@@ -37,6 +37,7 @@ repo2html := repo2html \
 		-l 'This content is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.' \
 		-C '/style.css' \
 		-f 'tools/thoughts-fmt' \
+		-F .listfilter \
 		-T '$(PWD)/tpl' \
 		-u '$(repo_url)' \
 		-U '$(repo_commit_url)' \