diff --git a/pykwalify/core.py b/pykwalify/core.py
index 140389c..8a14fe4 100644
--- a/pykwalify/core.py
+++ b/pykwalify/core.py
@@ -13,6 +13,7 @@
 import time
 from io import open
 from importlib.machinery import SourceFileLoader
+import importlib.util
 
 # pyKwalify imports
 import pykwalify
@@ -170,7 +171,11 @@ def _load_extensions(self):
             if not os.path.exists(f):
                 raise CoreError(u"Extension file: {0} not found on disk".format(f))
 
-            self.loaded_extensions.append(SourceFileLoader("", f).load_module())
+            loader = SourceFileLoader("", f)
+            spec = importlib.util.spec_from_loader(loader.name, loader)
+            mod = importlib.util.module_from_spec(spec)
+            loader.exec_module(mod)
+            self.loaded_extensions.append(mod)
 
         log.debug(self.loaded_extensions)
         log.debug([dir(m) for m in self.loaded_extensions])