diff --git a/tasks/osx.py b/tasks/osx.py
index 42215b1a..e67766b3 100644
--- a/tasks/osx.py
+++ b/tasks/osx.py
@@ -142,7 +142,7 @@ def cl_tools(ctx):
 @ctask
 def fix_htop(ctx):
     real_htop_location = ctx.run("readlink -f $(brew --prefix htop)").stdout.strip() + "/bin/htop"
-    ctx.run("chmod 6555 {0}".format(real_htop_location))
+    ctx.run("sudo chmod 6555 {0}".format(real_htop_location))
     ctx.run("sudo chown root {0}".format(real_htop_location))