version bump, changelog already done (#5791)

diff --git a/src/cryptography/__about__.py b/src/cryptography/__about__.py
index ec0a7bc..a885bd2 100644
--- a/src/cryptography/__about__.py
+++ b/src/cryptography/__about__.py
@@ -21,7 +21,7 @@
 )
 __uri__ = "https://github.com/pyca/cryptography"
 
-__version__ = "3.4.2"
+__version__ = "3.4.3"
 
 __author__ = "The Python Cryptographic Authority and individual contributors"
 __email__ = "cryptography-dev@python.org"
diff --git a/vectors/cryptography_vectors/__about__.py b/vectors/cryptography_vectors/__about__.py
index cc2e1b3..a03447d 100644
--- a/vectors/cryptography_vectors/__about__.py
+++ b/vectors/cryptography_vectors/__about__.py
@@ -18,7 +18,7 @@
 
 __uri__ = "https://github.com/pyca/cryptography"
 
-__version__ = "3.4.2"
+__version__ = "3.4.3"
 
 __author__ = "The Python Cryptographic Authority and individual contributors"
 __email__ = "cryptography-dev@python.org"