diff --git a/setup.py b/setup.py
index c7a7e1f..122f02b 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name = "X3DH",
-    version = "0.4.2",
+    version = "0.4.3",
     description = "A python implementation of the Extended Triple Diffie-Hellman key agreement protocol.",
     long_description = long_description,
     long_description_content_type = "text/markdown",
diff --git a/tests/test_x3dh.py b/tests/test_x3dh.py
index 404122b..cc6c87b 100644
--- a/tests/test_x3dh.py
+++ b/tests/test_x3dh.py
@@ -54,10 +54,7 @@ def test_x3dh():
         previous = len(state_bob.getPublicBundle().otpks)
 
         assert session_init_data["sk"] == other_session_data["sk"]
-
-        ad_len = len(session_init_data["ad"]) // 2
-        assert session_init_data["ad"][:ad_len] == other_session_data["ad"][ad_len:]
-        assert session_init_data["ad"][ad_len:] == other_session_data["ad"][:ad_len]
+        assert session_init_data["ad"] == other_session_data["ad"]
 
 def test_spk_rotation():
     state = ExampleStateB()
@@ -89,10 +86,7 @@ def test_serialization():
         previous = len(state_bob.getPublicBundle().otpks)
 
         assert session_init_data["sk"] == other_session_data["sk"]
-
-        ad_len = len(session_init_data["ad"]) // 2
-        assert session_init_data["ad"][:ad_len] == other_session_data["ad"][ad_len:]
-        assert session_init_data["ad"][ad_len:] == other_session_data["ad"][:ad_len]
+        assert session_init_data["ad"] == other_session_data["ad"]
 
     state_alice_serialized = json.dumps(state_alice.serialize())
     state_bob_serialized   = json.dumps(state_bob.serialize())
@@ -114,7 +108,4 @@ def test_serialization():
         previous = len(state_bob.getPublicBundle().otpks)
 
         assert session_init_data["sk"] == other_session_data["sk"]
-
-        ad_len = len(session_init_data["ad"]) // 2
-        assert session_init_data["ad"][:ad_len] == other_session_data["ad"][ad_len:]
-        assert session_init_data["ad"][ad_len:] == other_session_data["ad"][:ad_len]
+        assert session_init_data["ad"] == other_session_data["ad"]
diff --git a/x3dh/state.py b/x3dh/state.py
index 8f5998b..ab4c9d6 100644
--- a/x3dh/state.py
+++ b/x3dh/state.py
@@ -391,7 +391,7 @@ def initSessionActive(
             self.__curve
         )
 
-        ad = other_ik_enc_serialized + ik_enc_serialized
+        ad = ik_enc_serialized + other_ik_enc_serialized
 
         return {
             "to_other": {