--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <p align="center">
-   <img src="https://github.com/Yale-LILY/EHRKit/blob/master/wrapper_functions/EHRLogo.png?raw=true" alt="EHRKit"/>
+   <img src="https://github.com/Yale-LILY/EHRKit/blob/master/wrapper_functions/EHRLogo.png?format=raw" alt="EHRKit"/>
 </p>
 
 
@@ -12,7 +12,7 @@
 Moreover, if users want to deal with general medical texts, we integrate third-party libraries, including [hugginface](https://huggingface.co/), [scispacy](https://allenai.github.io/scispacy/), [allennlp](https://github.com/allenai/allennlp), [stanza](https://stanfordnlp.github.io/stanza/), and so on. Please checkout the special verison of this library, [EHRKit-WF](https://github.com/Yale-LILY/EHRKit/tree/master/wrapper_functions).
 
 <p align="center">
-   <img src="https://github.com/Yale-LILY/EHRKit-2022/blob/main/ehrkit.jpg?raw=true" alt="EHRKit"/>
+   <img src="https://github.com/Yale-LILY/EHRKit-2022/blob/main/ehrkit.jpg?format=raw" alt="EHRKit"/>
 </p>
 
 ## Table of Contents