diff --git a/wheezy.patch b/wheezy.patch
index 73e08b79..a263d455 100644
--- a/wheezy.patch
+++ b/wheezy.patch
@@ -1,18 +1,16 @@
-diff --git a/lower-constraints.txt b/lower-constraints.txt
-index a02749a..1741a51 100644
---- a/lower-constraints.txt
-+++ b/lower-constraints.txt
+diff -urN pyghmi/lower-constraints.txt pyghmi-wheezy/lower-constraints.txt
+--- pyghmi/lower-constraints.txt	2018-08-30 09:41:36.771908238 -0400
++++ pyghmi-wheezy/lower-constraints.txt	2019-02-08 14:27:21.322413226 -0500
 @@ -1,5 +1,4 @@
  coverage===4.0
 -cryptography===2.1
  fixtures===3.0.0
  openstackdocstheme==1.18.1
  oslotest===3.2.0
-diff --git a/pyghmi/ipmi/private/session.py b/pyghmi/ipmi/private/session.py
-index 0cd2043..c31020d 100644
---- a/pyghmi/ipmi/private/session.py
-+++ b/pyghmi/ipmi/private/session.py
-@@ -28,8 +28,8 @@ import struct
+diff -urN pyghmi/pyghmi/ipmi/private/session.py pyghmi-wheezy/pyghmi/ipmi/private/session.py
+--- pyghmi/pyghmi/ipmi/private/session.py	2019-02-08 14:26:57.039077089 -0500
++++ pyghmi-wheezy/pyghmi/ipmi/private/session.py	2019-02-08 14:28:35.048397582 -0500
+@@ -28,8 +28,8 @@
  import threading
  
  
@@ -23,7 +21,7 @@ index 0cd2043..c31020d 100644
  
  import pyghmi.exceptions as exc
  from pyghmi.ipmi.private import constants
-@@ -309,10 +309,6 @@ class Session(object):
+@@ -309,10 +309,6 @@
      # can do something like reassign our threading and select modules
      socketchecking = None
  
@@ -34,7 +32,7 @@ index 0cd2043..c31020d 100644
      @classmethod
      def _cleanup(cls):
          for sesskey in list(cls.bmc_handlers):
-@@ -872,14 +868,9 @@ class Session(object):
+@@ -872,14 +868,9 @@
                  iv = os.urandom(16)
                  message += iv
                  payloadtocrypt = bytes(payload + _aespad(payload))
@@ -52,7 +50,7 @@ index 0cd2043..c31020d 100644
              else:  # no confidetiality algorithm
                  message.append(psize & 0xff)
                  message.append(psize >> 8)
-@@ -1367,14 +1358,9 @@ class Session(object):
+@@ -1366,14 +1357,9 @@
              payload = data[16:16 + psize]
              if encrypted:
                  iv = data[16:32]
@@ -66,14 +64,13 @@ index 0cd2043..c31020d 100644
 -                                                     ) + decryptor.finalize())
 +                decrypter = AES.new(self.aeskey, AES.MODE_CBC, iv)
 +                decrypted = decrypter.decrypt(payload[16:])
-+                payload = decrypted
++                payload = bytearray(decrypted)
                  padsize = payload[-1] + 1
                  payload = payload[:-padsize]
              if ptype == 0:
-diff --git a/requirements.txt b/requirements.txt
-index 1fb58a9..26ff921 100644
---- a/requirements.txt
-+++ b/requirements.txt
+diff -urN pyghmi/requirements.txt pyghmi-wheezy/requirements.txt
+--- pyghmi/requirements.txt	2018-08-15 08:43:19.779309677 -0400
++++ pyghmi-wheezy/requirements.txt	2019-02-08 14:27:21.322413226 -0500
 @@ -1 +1 @@
 -cryptography>=2.1  # BSD/Apache-2.0
 +pycryptodomex>=2.6