diff --git a/content/topic/lessons-in-how-(not)-to-be-heard.md b/content/topic/lessons-in-how-(not)-to-be-heard.md
index fadb98f..fd13112 100644
--- a/content/topic/lessons-in-how-(not)-to-be-heard.md
+++ b/content/topic/lessons-in-how-(not)-to-be-heard.md
@@ -1,6 +1,6 @@
 ---
 title: "Lessons in how (not) to be heard"
-has_experiments:
+has_experiments: [0]
 ---
 # Lessons in how (not) to be heard
 
diff --git a/content/topic/listening-with-the-pandemic.md b/content/topic/listening-with-the-pandemic.md
index 5cbad66..876c499 100644
--- a/content/topic/listening-with-the-pandemic.md
+++ b/content/topic/listening-with-the-pandemic.md
@@ -1,6 +1,6 @@
 ---
 title: "Listening with the pandemic"
-has_experiments:
+has_experiments: ["living-with-a-black-box.md"]
 ---
 ![ML](static/images/02.gif)