diff --git a/slixmpp_omemo/__init__.py b/slixmpp_omemo/__init__.py
index fd0586c..2e74900 100644
--- a/slixmpp_omemo/__init__.py
+++ b/slixmpp_omemo/__init__.py
@@ -179,6 +179,9 @@ class XEP_0384(BasePlugin):
 
     backend_loaded = HAS_OMEMO
 
+    # OMEMO Bundles used for encryption
+    bundles = {}  # type: Dict[str, Dict[int, ExtendedPublicBundle]]
+
     def plugin_init(self) -> None:
         if not self.backend_loaded:
             log.info("xep_0384 cannot be loaded as the backend omemo library "
@@ -441,7 +444,6 @@ class XEP_0384(BasePlugin):
         """
 
         recipients = [jid.bare for jid in recipients]
-        bundles = {}  # type: Dict[str, Dict[int, ExtendedPublicBundle]]
 
         old_errors = None  # type: Optional[List[Tuple[Exception, Any, Any]]]
         while True:
@@ -456,7 +458,7 @@ class XEP_0384(BasePlugin):
                 encrypted = self._omemo.encryptMessage(
                     recipients,
                     plaintext.encode('utf-8'),
-                    bundles,
+                    self.bundles,
                     expect_problems=expect_problems,
                 )
                 return _generate_encrypted_payload(encrypted)
@@ -474,7 +476,7 @@ class XEP_0384(BasePlugin):
                 elif isinstance(exn, omemo.exceptions.MissingBundleException):
                     bundle = await self._fetch_bundle(exn.bare_jid, exn.device)
                     if bundle is not None:
-                        devices = bundles.setdefault(exn.bare_jid, {})
+                        devices = self.bundles.setdefault(exn.bare_jid, {})
                         devices[exn.device] = bundle
                 elif isinstance(exn, omemo.exceptions.TrustException):
                     # On TrustException, there are two possibilities.