diff --git a/main/runner.sh b/main/runner.sh
index 8768da4..1da7cf1 100644
--- a/main/runner.sh
+++ b/main/runner.sh
@@ -66,7 +66,7 @@ After=docker.service
 
 [Service]
 ExecStart=/usr/local/bin/act_runner daemon --config /usr/local/bin/$FILE
-ExecReload=/bin/kill -s HUP $MAINPID
+ExecReload=/bin/kill -s HUP \$MAINPID
 WorkingDirectory=/usr/local/bin
 TimeoutSec=0
 RestartSec=10