diff --git a/adsl.py b/adsl.py
index b6f0d9f..113e597 100644
--- a/adsl.py
+++ b/adsl.py
@@ -13,9 +13,8 @@ def _get_process_list():
     processes = []
     for pid in pids:
         try:
-            f = open("/proc/%i/cmdline" % pid, "r")
-            processes.append(f.read())
-            f.close()
+            with open("/proc/%i/cmdline" % pid, "r") as f:
+                processes.append(f.read())
         except:
             pass
     return zip(pids, processes)