diff --git a/murano/dsl/helpers.py b/murano/dsl/helpers.py
index 0adaebb73..07c5901aa 100644
--- a/murano/dsl/helpers.py
+++ b/murano/dsl/helpers.py
@@ -125,7 +125,7 @@ def parallel_select(collection, func, limit=1000):
     except StopIteration:
         return map(lambda t: t[0], result)
     else:
-        raise exception[0], None, exception[2]
+        six.reraise(exception[0], None, exception[2])
 
 
 def enum(**enums):
diff --git a/murano/dsl/typespec.py b/murano/dsl/typespec.py
index a193dda49..034bfd7b5 100644
--- a/murano/dsl/typespec.py
+++ b/murano/dsl/typespec.py
@@ -76,7 +76,8 @@ class PropertySpec(Spec):
         except exceptions.ContractViolationException as e:
             msg = u'[{0}.{1}{2}] {3}'.format(
                 self.class_name, self.property_name, e.path, six.text_type(e))
-            raise exceptions.ContractViolationException, msg, sys.exc_info()[2]
+            six.reraise(exceptions.ContractViolationException,
+                        msg, sys.exc_info()[2])
 
 
 class ArgumentSpec(Spec):
@@ -93,4 +94,5 @@ class ArgumentSpec(Spec):
             msg = u'[{0}::{1}({2}{3})] {4}'.format(
                 self.class_name, self.method_name, self.arg_name,
                 e.path, six.text_type(e))
-            raise exceptions.ContractViolationException, msg, sys.exc_info()[2]
+            six.reraise(exceptions.ContractViolationException,
+                        msg, sys.exc_info()[2])
diff --git a/murano/engine/package_loader.py b/murano/engine/package_loader.py
index 0da2effac..763eb5622 100644
--- a/murano/engine/package_loader.py
+++ b/murano/engine/package_loader.py
@@ -82,7 +82,8 @@ class ApiPackageLoader(package_loader.MuranoPackageLoader):
             package_definition = self._get_definition(filter_opts)
         except LookupError:
             exc_info = sys.exc_info()
-            raise exceptions.NoPackageFound(package_name), None, exc_info[2]
+            six.reraise(exceptions.NoPackageFound(package_name),
+                        None, exc_info[2])
         return self._to_dsl_package(
             self._get_package_by_definition(package_definition))
 
@@ -156,7 +157,7 @@ class ApiPackageLoader(package_loader.MuranoPackageLoader):
                 package_id, str(e)
             )
             exc_info = sys.exc_info()
-            raise pkg_exc.PackageLoadError(msg), None, exc_info[2]
+            six.reraise(pkg_exc.PackageLoadError(msg), None, exc_info[2])
         package_file = None
         try:
             with tempfile.NamedTemporaryFile(delete=False) as package_file:
@@ -170,7 +171,7 @@ class ApiPackageLoader(package_loader.MuranoPackageLoader):
         except IOError:
             msg = 'Unable to extract package data for %s' % package_id
             exc_info = sys.exc_info()
-            raise pkg_exc.PackageLoadError(msg), None, exc_info[2]
+            six.reraise(pkg_exc.PackageLoadError(msg), None, exc_info[2])
         finally:
             try:
                 if package_file:
diff --git a/murano/engine/system/agent.py b/murano/engine/system/agent.py
index b7354f80b..860966c02 100644
--- a/murano/engine/system/agent.py
+++ b/murano/engine/system/agent.py
@@ -16,12 +16,12 @@
 import copy
 import datetime
 import os
-import urlparse
 import uuid
 
 import eventlet.event
 from oslo_config import cfg
 from oslo_log import log as logging
+from six.moves import urllib
 from yaql import specs
 
 import murano.common.exceptions as exceptions
@@ -258,7 +258,7 @@ class Agent(object):
 
     def _is_url(self, file):
         file = self._get_url(file)
-        parts = urlparse.urlsplit(file)
+        parts = urllib.parse.urlsplit(file)
         if not parts.scheme or not parts.netloc:
             return False
         else: