OpenCV Contours - need more than 2 values to unpack

findContours returns just three values image, contours and hierarchy in opencv3

image, contours, hierarchy = cv2.findContours(thresh,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)

It now returns three values:

findContours(image, mode, method[, contours[, hierarchy[, offset]]])

return image, contours, hierarchy

In OpenCV 2, findContours returns just two values, contours and hierarchy. The error occurs when python tries to assign those two values to the three names given on left in this statement:

image, contours, hierarchy = cv2.findContours(thresh,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)