diff --git a/src/pyarcanist/tools.py b/src/pyarcanist/tools.py
index fe79351..3b814c6 100644
--- a/src/pyarcanist/tools.py
+++ b/src/pyarcanist/tools.py
@@ -1,17 +1,18 @@
-import os
+import subprocess as sp
 from . import cli
 
 try:
-    ROWS, COLUMNS = map(int, os.popen('stty size', 'r').read().split())
-except ValueError:
+    ROWS, COLUMNS = map(int, sp.check_output(
+        ['stty', 'size'], stderr=sp.DEVNULL).split())
+except sp.CalledProcessError:
     ROWS, COLUMNS = 25, 80
 
 
 def wrap(msg, width=COLUMNS):
     if len(msg) > width:
         return msg[:width-1] + '\u2026'
     return msg
 
 
 def object_from_phid(phid):
     return cli.cnx.phid.query(phids=[phid])[phid]