diff --git a/plugin.py b/plugin.py
index 114e055..e858055 100644
--- a/plugin.py
+++ b/plugin.py
@@ -185,7 +185,7 @@ class XEP_0384(BasePlugin):
         header = msg['omemo_encrypted']['header']
         payload = msg['omemo_encrypted']['payload']
 
-        jid = msg['from']
+        jid = msg['from'].bare
         sid = header['sid']
 
         key = header.xml.find("{%s}key[@rid='%s']" % (
diff --git a/session.py b/session.py
index aaca555..3b318e8 100644
--- a/session.py
+++ b/session.py
@@ -1,7 +1,7 @@
 import omemo
 from slixmpp.plugins.xep_0384.storage import SQLiteDatabase
 from omemo.util import generateDeviceID
-
+import base64
 
 class SessionManager:
     def __init__(self, own_jid, db_path):
@@ -49,6 +49,10 @@ class SessionManager:
         return self._sm.encryptMessage(jids, plaintext, bundles, devices, callback)
 
     def decrypt(self, jid, sid, iv, message, payload, prekey):
+        iv = base64.b64decode(iv.get_value())
+        payload = base64.b64decode(payload.get_value())
+        message = base64.b64decode(message)
+        sid = int(sid)
         if prekey:
             return self._sm.decryptMessage(jid, sid, iv, message, payload)
         return self._sm.decryptPreKeyMessage(jid, sid, iv, message, payload)
diff --git a/stanza.py b/stanza.py
index 4eaeb11..2c07c5f 100644
--- a/stanza.py
+++ b/stanza.py
@@ -65,14 +65,33 @@ class IV(ElementBase):
     namespace = OMEMO_BASE_NS
     name = 'iv'
     plugin_attrib = name
-    interfaces = set()
+    interfaces = {'value'}
+
+    def get_value(self):
+        return self.xml.text
+
+    def set_value(self, value):
+        self.xml.text = str(value)
+
+    def del_value(self):
+        self.xml.text = ''
 
 
 class Payload(ElementBase):
     namespace = OMEMO_BASE_NS
     name = 'payload'
     plugin_attrib = name
-    interfaces = set()
+    interfaces = {'value'}
+
+    def get_value(self):
+        return self.xml.text
+
+    def set_value(self, value):
+        self.xml.text = str(value)
+
+    def del_value(self):
+        self.xml.text = ''
+
 
 
 class Bundle(ElementBase):