diff --git a/topogram_client/__init__.py b/topogram_client/__init__.py
index 2daf88c..c9b5280 100644
--- a/topogram_client/__init__.py
+++ b/topogram_client/__init__.py
@@ -129,7 +129,7 @@ def create_node(self, topogramId, id=None, x=None, y=None, data={}):
         assert type(data) is dict
         if id : assert type(id) is str
         if x : assert type(x) is float or type(x) is int
-        if y : assert type(y) is float or type(x) is int
+        if y : assert type(y) is float or type(y) is int
 
         el = {
             "id" : id,
@@ -167,7 +167,7 @@ def create_edge(self, topogramId, source, target, name=None, data={}):
         """POST Create a single edge. Returns the created edge."""
         assert type(data) is dict
         assert type(source) is str
-        assert type(source) is str
+        assert type(target) is str
         if name : assert type(name) is str
         print name
         el = {