diff --git a/config/reaction.service b/config/reaction.service
index 0e72a1c..897e869 100644
--- a/config/reaction.service
+++ b/config/reaction.service
@@ -15,6 +15,8 @@ StateDirectory=reaction
 RuntimeDirectory=reaction
 # Start reaction in its state directory
 WorkingDirectory=/var/lib/reaction
+# Let reaction kill its child processes first
+KillMode=mixed
 
 [Install]
 WantedBy=multi-user.target
diff --git a/packaging/reaction.service b/packaging/reaction.service
index 3003b85..5bd1478 100644
--- a/packaging/reaction.service
+++ b/packaging/reaction.service
@@ -15,6 +15,8 @@ StateDirectory=reaction
 RuntimeDirectory=reaction
 # Start reaction in its state directory
 WorkingDirectory=/var/lib/reaction
+# Let reaction kill its child processes first
+KillMode=mixed
 
 [Install]
 WantedBy=multi-user.target