diff --git a/README.md b/README.md
index 4741a4e39939e4f0ec9e3a4035fe68b7d8cf6dce..cc67fb5e0d09b205232df198f2ae21575c21f8d3 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ X2Paddle在之前的开发过程中，对比了PaddlePaddle与主流框架上的
 ## 环境依赖
 
 python == 2.7 | python >= 3.5  
-paddlepaddle >= 1.5.0  
+paddlepaddle >= 1.6.1  
 
 **按需安装以下依赖**  
 tensorflow ： tensorflow == 1.14.0  
diff --git a/x2paddle/decoder/tf_decoder.py b/x2paddle/decoder/tf_decoder.py
index 0bbfc3e006d53ba6001fd37fd16fe7a729f5ad91..9bf45b408393cc5609387e06eb3bb87b2dfd51aa 100644
--- a/x2paddle/decoder/tf_decoder.py
+++ b/x2paddle/decoder/tf_decoder.py
@@ -390,7 +390,7 @@ class TFDecoder(object):
         compare12 = (results[1] == results[2])
 
         compare = compare01 & compare12
-        index = numpy.argwhere(compare==False).flatten()
+        index = numpy.argwhere(compare == False).flatten()
         results[0][index] = -1
         return results[0].tolist()
 
@@ -421,6 +421,6 @@ class TFDecoder(object):
             return shape[0].tolist()
 
         compare = compare01 & compare12
-        index = numpy.argwhere(compare==False).flatten()
+        index = numpy.argwhere(compare == False).flatten()
         shapes[0][index] = -1
         return shapes[0].tolist()