diff --git a/README.md b/README.md
index e1a55ba..b3b6114 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,13 @@ How to use:
   - The generation of correlation matrix for point spread functions is slow. You can download the correlation matrices prepared by us and put them under the data folder. The correlation matrices are available at: 
   
     https://drive.google.com/file/d/1W5yyXiPQSKssIwIdsIMofBN7eZ9nuApx/view?usp=sharing
+    
+The code is tested with the following environment: 
+  - Python      3.6
+  - Pytorch     1.4.0
+  - Numpy	    1.19.2
+  - Scipy       1.6.0
+  - Matplotlib  3.3.6
 
 If you find our work helpful in your research, please consider cite our paper