diff --git a/thisweek/_posts/2020-02-10-changelog-11.adoc b/thisweek/_posts/2020-02-10-changelog-11.adoc
index 633aee1d..745897a5 100644
--- a/thisweek/_posts/2020-02-10-changelog-11.adoc
+++ b/thisweek/_posts/2020-02-10-changelog-11.adoc
@@ -1,5 +1,6 @@
 = Changelog #11
 :sectanchors:
+:experimental:
 :page-layout: post
 
 Commit: commit:5b703bdc582be427ee62d250b3d3290165c36b8c[] +
diff --git a/thisweek/_posts/2020-02-24-changelog-13.adoc b/thisweek/_posts/2020-02-24-changelog-13.adoc
index e363249a..8cbc148b 100644
--- a/thisweek/_posts/2020-02-24-changelog-13.adoc
+++ b/thisweek/_posts/2020-02-24-changelog-13.adoc
@@ -1,5 +1,6 @@
 = Changelog #13
 :sectanchors:
+:experimental:
 :page-layout: post
 
 Commit: commit:cba3c991c8188e87363bbff190e9528606140808[] +
diff --git a/thisweek/_posts/2020-03-02-changelog-14.adoc b/thisweek/_posts/2020-03-02-changelog-14.adoc
index 547d5621..355868ec 100644
--- a/thisweek/_posts/2020-03-02-changelog-14.adoc
+++ b/thisweek/_posts/2020-03-02-changelog-14.adoc
@@ -1,5 +1,6 @@
 = Changelog #14
 :sectanchors:
+:experimental:
 :page-layout: post
 
 Commit: commit:2c8f136b162e795a32e7dff2d0456c323377575d[] +
diff --git a/thisweek/_posts/2020-03-16-changelog-16.adoc b/thisweek/_posts/2020-03-16-changelog-16.adoc
index d52588b7..20d7bcad 100644
--- a/thisweek/_posts/2020-03-16-changelog-16.adoc
+++ b/thisweek/_posts/2020-03-16-changelog-16.adoc
@@ -1,5 +1,6 @@
 = Changelog #16
 :sectanchors:
+:experimental:
 :page-layout: post
 
 Commit: commit:ebab250b6bffaafb347ce431d5f4c9eeab4aa7e3[] +
diff --git a/thisweek/_posts/2020-04-20-changelog-21.adoc b/thisweek/_posts/2020-04-20-changelog-21.adoc
index b86b0524..d877d7de 100644
--- a/thisweek/_posts/2020-04-20-changelog-21.adoc
+++ b/thisweek/_posts/2020-04-20-changelog-21.adoc
@@ -1,5 +1,6 @@
 = Changelog #21
 :sectanchors:
+:experimental:
 :page-layout: post
 :!figure-caption: