diff --git a/docs/assets/c4_system.mmd b/docs/assets/c4_system.mmd
index cc5a59a89..7a40986fa 100644
--- a/docs/assets/c4_system.mmd
+++ b/docs/assets/c4_system.mmd
@@ -19,7 +19,7 @@ qgisPlugin-->|read/write|model
 api-->|read/write|model
 ribasim-->|simulate|model
 
-output[("simulation output\n[arrow]")]:::system
+output[("simulation results\n[arrow]")]:::system
 ribasim-->|write|output
 
 class qgisBoundary boundary