diff --git a/wsme/tests/test_types.py b/wsme/tests/test_types.py
index f5f5abe..0f3c190 100644
--- a/wsme/tests/test_types.py
+++ b/wsme/tests/test_types.py
@@ -177,13 +177,14 @@ class TestTypes(unittest.TestCase):
         obj.a = 'v1'
         assert obj.a == 'v1', repr(obj.a)
 
-        self.assertRaisesRegexp(exc.InvalidInput,
-                                "Invalid input for field/attribute a. \
-Value: 'v3'. Value should be one of: v., v.",
-                                setattr,
-                                obj,
-                                'a',
-                                'v3')
+        self.assertRaisesRegex(
+            exc.InvalidInput,
+            "Invalid input for field/attribute a. "
+            "Value: 'v3'. Value should be one of: v., v.",
+            setattr,
+            obj,
+            'a',
+            'v3')
 
     def test_attribute_validation(self):
         class AType(object):
diff --git a/wsmeext/flask.py b/wsmeext/flask.py
index 7ce5760..80836d9 100644
--- a/wsmeext/flask.py
+++ b/wsmeext/flask.py
@@ -42,7 +42,7 @@ def signature(*args, **kw):
     sig = wsme.signature(*args, **kw)
 
     def decorator(f):
-        args = inspect.getargspec(f)[0]
+        args = inspect.getfullargspec(f)[0]
         ismethod = args and args[0] == 'self'
         sig(f)
         funcdef = wsme.api.FunctionDefinition.get(f)