diff --git a/index.md b/index.md
index b26cf0c..0095f33 100644
--- a/index.md
+++ b/index.md
@@ -176,5 +176,5 @@ The following slide deck and video playlist provide the last snapshot of the cur
 
 ### Systems
 
- [slides](https://github.com/potassco-asp-course/course/releases/download/v1.19.3/systems.pdf)
+ [slides](https://github.com/potassco-asp-course/course/releases/download/v1.19.4/systems.pdf)
  [workspace](/systems/)
diff --git a/systems.md b/systems.md
index 71a223a..a138d33 100644
--- a/systems.md
+++ b/systems.md
@@ -5,9 +5,9 @@ permalink: /systems/
 ---
 ### Lecture slides
 
-  [pdf](https://github.com/potassco-asp-course/course/releases/download/v1.19.3/systems.pdf)
+  [pdf](https://github.com/potassco-asp-course/course/releases/download/v1.19.4/systems.pdf)
   [git](https://github.com/potassco-asp-course/systems)
-  [v.19.3](https://github.com/potassco-asp-course/course/releases/tag/v1.19.3)
+  [v.19.4](https://github.com/potassco-asp-course/course/releases/tag/v1.19.4)
 
 ### Literature