diff --git a/deploy/python/keypoint_infer.py b/deploy/python/keypoint_infer.py
index ec36a193027b0cb168d85474bb8ecc0c18a5a263..e16ddd647cf58a58bb9b4c8cb239fd9e3d472673 100644
--- a/deploy/python/keypoint_infer.py
+++ b/deploy/python/keypoint_infer.py
@@ -288,7 +288,7 @@ def create_inputs(imgs, im_info):
         inputs (dict): input of model
     """
     inputs = {}
-    inputs['image'] = np.stack(imgs, axis=0)
+    inputs['image'] = np.stack(imgs, axis=0).astype('float32')
     im_shape = []
     for e in im_info:
         im_shape.append(np.array((e['im_shape'])).astype('float32'))