diff --git a/README.md b/README.md
index ec08f5d1ba7641986744143d608d5d9b815ecada..82acda2dc368a6474367d59d44ae24472aa334cd 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Data is becoming more and more expensive nowadays, and sharing of raw data is ve
 
 ## Overview of PaddleFL
 
-<img src='images/FL-framework.png' width = "1300" height = "310" align="middle"/>
+<img src='images/FL-framework.png' width = "1300" height = "280" align="middle"/>
 
 In PaddleFL, horizontal and vertical federated learning strategies will be implemented according to the categorization given in [4]. Application demonstrations in natural language processing, computer vision and recommendation will be provided in PaddleFL. 
 
@@ -29,7 +29,7 @@ In PaddleFL, horizontal and vertical federated learning strategies will be imple
 
 ## Framework design of PaddleFL
 
-<img src='images/FL-training.png' width = "1300" height = "310" align="middle"/>
+<img src='images/FL-training.png' width = "1300" height = "280" align="middle"/>
 
 In PaddleFL, components for defining a federated learning task and training a federated learning job are as follows:
 
@@ -96,4 +96,4 @@ Gru4Rec [9] introduces recurrent neural network model in session-based recommend
 
 [8]. Yang Liu, Tianjian Chen, Qiang Yang. **Secure Federated Transfer Learning.** 2018
 
-[9]. Balázs Hidasi, Alexandros Karatzoglou, Linas Baltrunas, Domonkos Tikk. **Session-based Recommendations with Recurrent Neural Networks.** 2016
\ No newline at end of file
+[9]. Balázs Hidasi, Alexandros Karatzoglou, Linas Baltrunas, Domonkos Tikk. **Session-based Recommendations with Recurrent Neural Networks.** 2016