diff --git a/config/code_ocean.yml.example b/config/code_ocean.yml.example
index 740b1598..df56be79 100644
--- a/config/code_ocean.yml.example
+++ b/config/code_ocean.yml.example
@@ -49,8 +49,9 @@ default: &default
     # The authorization token for connections to the runner management (Poseidon only)
     # If TLS support is not enabled, this token is transmitted in clear text!
     token: SECRET
-    # The maximum time in seconds a runner may idle at the runner management before
-    # it is removed. Each begin of an interaction with the runner resets this time
+    # The maximum time in seconds a runner may idle at the runner management before it is removed.
+    # Each begin of an interaction with the runner resets this time. Thus, this value should
+    # be truly greater than any permitted execution time of an execution environment.
     unused_runner_expiration_time: 180