diff --git a/docs/conf.py b/docs/conf.py
index e5820e5..180de86 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -20,11 +20,11 @@
 # -- Project information -----------------------------------------------------
 
 project = 'pyVoIP'
-copyright = '2022, Tayler Porter'
+copyright = '2023, Tayler Porter'
 author = 'Tayler J Porter'
 
 # The full version, including alpha/beta/rc tags
-release = '1.6.2'
+release = '1.6.3'
 
 master_doc = 'index'
 
diff --git a/pyVoIP/SIP.py b/pyVoIP/SIP.py
index 93372a7..d8bad03 100644
--- a/pyVoIP/SIP.py
+++ b/pyVoIP/SIP.py
@@ -1602,6 +1602,7 @@ def invite(
         if response.status == SIPStatus(100) or response.status == SIPStatus(
             180
         ):
+            self.recvLock.release()
             return SIPMessage(invite.encode("utf8")), call_id, sess_id
         debug(f"Received Response: {response.summary()}")
         ack = self.genAck(response)
diff --git a/pyVoIP/__init__.py b/pyVoIP/__init__.py
index ee02426..bc3ff43 100644
--- a/pyVoIP/__init__.py
+++ b/pyVoIP/__init__.py
@@ -1,6 +1,6 @@
 __all__ = ["SIP", "RTP", "VoIP"]
 
-version_info = (1, 6, 2)
+version_info = (1, 6, 3)
 
 __version__ = ".".join([str(x) for x in version_info])
 
diff --git a/setup.py b/setup.py
index 22c17e8..a328e31 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 setup(
     name="pyVoIP",
-    version="1.6.2",
+    version="1.6.3",
     description="PyVoIP is a pure python VoIP/SIP/RTP library.",
     long_description=long_description,
     long_description_content_type="text/markdown",