diff --git a/slides/intro/intro.md b/slides/intro/intro.md
index 3d598730..16a4e0c8 100644
--- a/slides/intro/intro.md
+++ b/slides/intro/intro.md
@@ -1,7 +1,8 @@
 ## A brief introduction
 
-- This was initially written by [Jérôme Petazzoni](https://twitter.com/jpetazzo) to support in-person,
-  instructor-led workshops and tutorials; credit is also due to [multiple contributors](https://github.com/jpetazzo/container.training/graphs/contributors)
+- This was initially written to support in-person, instructor-led workshops and tutorials
+
+- These materials are maintained by [Jérôme Petazzoni](https://twitter.com/jpetazzo) and [multiple contributors](https://github.com/jpetazzo/container.training/graphs/contributors)
 
 - You can also follow along on your own, at your own pace
 
diff --git a/slides/kube/intro.md b/slides/kube/intro.md
index 23e804a3..a0090371 100644
--- a/slides/kube/intro.md
+++ b/slides/kube/intro.md
@@ -1,7 +1,9 @@
 ## A brief introduction
 
 - This was initially written by [Jérôme Petazzoni](https://twitter.com/jpetazzo) to support in-person,
-  instructor-led workshops and tutorials; credit is also due to [multiple contributors](https://github.com/jpetazzo/container.training/graphs/contributors)
+  instructor-led workshops and tutorials
+  
+- Credit is also due to [multiple contributors](https://github.com/jpetazzo/container.training/graphs/contributors) — thank you!
 
 - You can also follow along on your own, at your own pace
 
diff --git a/slides/swarm/intro.md b/slides/swarm/intro.md
index 9c9f379e..6db88c16 100644
--- a/slides/swarm/intro.md
+++ b/slides/swarm/intro.md
@@ -1,7 +1,9 @@
 ## A brief introduction
 
 - This was initially written by [Jérôme Petazzoni](https://twitter.com/jpetazzo) to support in-person,
-  instructor-led workshops and tutorials; credit is also due to [multiple contributors](https://github.com/jpetazzo/container.training/graphs/contributors)
+  instructor-led workshops and tutorials
+  
+- Over time, [multiple contributors](https://github.com/jpetazzo/container.training/graphs/contributors) also helped to improve these materials — thank you!
 
 - You can also follow along on your own, at your own pace