diff --git a/monkey/common/cloud/aws_instance.py b/monkey/common/cloud/aws_instance.py
index 0aece9bcc..cba1f3670 100644
--- a/monkey/common/cloud/aws_instance.py
+++ b/monkey/common/cloud/aws_instance.py
@@ -30,14 +30,14 @@ class AwsInstance(object):
             self.region = self._parse_region(
                 urllib.request.urlopen(AWS_LATEST_METADATA_URI_PREFIX + 'meta-data/placement/availability-zone').read())
         except urllib.error.URLError as e:
-            logger.warning("Failed init of AwsInstance while getting metadata: {}".format(e.message))
+            logger.warning("Failed init of AwsInstance while getting metadata: {}".format(e))
 
         try:
             self.account_id = self._extract_account_id(
                 urllib.request.urlopen(
                     AWS_LATEST_METADATA_URI_PREFIX + 'dynamic/instance-identity/document', timeout=2).read())
         except urllib.error.URLError as e:
-            logger.warning("Failed init of AwsInstance while getting dynamic instance data: {}".format(e.message))
+            logger.warning("Failed init of AwsInstance while getting dynamic instance data: {}".format(e))
 
     @staticmethod
     def _parse_region(region_url_response):
diff --git a/monkey/infection_monkey.py b/monkey/infection_monkey.py
index 7059088c9..a63dec069 100644
--- a/monkey/infection_monkey.py
+++ b/monkey/infection_monkey.py
@@ -1,4 +1,4 @@
-from . import infection_monkey.main
+from infection_monkey.main import main
 
 if "__main__" == __name__:
-    infection_monkey.main.main()
+    main()
diff --git a/monkey/monkey_island/cc/encryptor.py b/monkey/monkey_island/cc/encryptor.py
index 98473b60a..d727fe10c 100644
--- a/monkey/monkey_island/cc/encryptor.py
+++ b/monkey/monkey_island/cc/encryptor.py
@@ -41,7 +41,7 @@ class Encryptor:
     def enc(self, message):
         cipher_iv = Random.new().read(AES.block_size)
         cipher = AES.new(self._cipher_key, AES.MODE_CBC, cipher_iv)
-        return base64.b64encode(cipher_iv + cipher.encrypt(str(self._pad(message))))  # ciper.encrypt expects str
+        return base64.b64encode(cipher_iv + cipher.encrypt(self._pad(message).encode()))
 
     def dec(self, enc_message):
         enc_message = base64.b64decode(enc_message)
diff --git a/monkey/monkey_island/cc/environment/__init__.py b/monkey/monkey_island/cc/environment/__init__.py
index 0115cf446..4d125e98c 100644
--- a/monkey/monkey_island/cc/environment/__init__.py
+++ b/monkey/monkey_island/cc/environment/__init__.py
@@ -1,4 +1,4 @@
-import abc
+from abc import ABCMeta, abstractmethod
 from datetime import timedelta
 import os
 from Crypto.Hash import SHA3_512
@@ -6,7 +6,7 @@ from Crypto.Hash import SHA3_512
 __author__ = 'itay.mizeretz'
 
 
-class Environment(object, metaclass=abc.ABCMeta):
+class Environment(object, metaclass=ABCMeta):
     _ISLAND_PORT = 5000
     _MONGO_DB_NAME = "monkeyisland"
     _MONGO_DB_HOST = "localhost"
@@ -67,7 +67,7 @@ class Environment(object, metaclass=abc.ABCMeta):
             val = self.config.get(key, val)
         return val
 
-    @abc.abstractmethod
+    @abstractmethod
     def get_auth_users(self):
         return