diff --git a/bumblebee/outputs/i3.py b/bumblebee/outputs/i3.py
index 5d77542..9632e0b 100644
--- a/bumblebee/outputs/i3.py
+++ b/bumblebee/outputs/i3.py
@@ -24,7 +24,7 @@ def read_input(output):
                 instance = event.get("instance", ""),
                 button = event.get("button", -1)
             )
-            subprocess.call(shlex.split(cb), stdout=DEVNULL, stderr=DEVNULL)
+            subprocess.Popen(shlex.split(cb), stdout=DEVNULL, stderr=DEVNULL)
 
 class i3bar(bumblebee.output.Output):
     def __init__(self, theme):