diff --git a/pygrad/tensor.py b/pygrad/tensor.py
index c01f1f0..473aa5c 100644
--- a/pygrad/tensor.py
+++ b/pygrad/tensor.py
@@ -54,7 +54,7 @@ class Tensor:
 
     def back(upstream):
       a, b = tensor._parents
-      return np.dot(b.value, upstream), np.dot(a.value.T, upstream)
+      return np.dot(upstream, b.value.T), np.dot(a.value.T, upstream)
 
     tensor._back = back
     return tensor
@@ -131,7 +131,7 @@ class Tensor:
     def back(upstream):
       # dtanh(x)/dx = 1 - tanh2(x)
       a, = tensor._parents
-      return [1 - np.dot(np.tanh(a.value) ** 2, upstream)]
+      return [np.ones_like(self.value) - np.dot(upstream, (np.tanh(a.value) ** 2).T)]
 
     tensor._back = back
     return tensor