diff --git a/planetstack/openstack/driver.py b/planetstack/openstack/driver.py
index b8faf25..4130d00 100644
--- a/planetstack/openstack/driver.py
+++ b/planetstack/openstack/driver.py
@@ -417,12 +417,9 @@
         if not security_group:
             security_group = self.config.nova_default_security_group
 
-        personality = []
+        files = {}
         if pubkeys:
-            personality.append({
-                'path': '/root/.ssh/authorized_keys',
-                'contents':"\n".join(pubkeys),
-        })       
+            files["/root/.ssh/authorized_keys"] = "\n".join(pubkeys).encode('base64')
         hints = {}
         availability_zone = None
         if hostname:
@@ -433,7 +430,7 @@
                                             flavor=flavor.id,
                                             image=image_id,
                                             security_group = security_group,
-                                            personality = personality,
+                                            files = files,
                                             scheduler_hints=hints,
                                             availability_zone=availability_zone,
                                             nics=nics,