diff --git a/README.md b/README.md
index 5b6f3bb..a95d9e6 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,9 @@ This program extract various website information based on URL addresses. This da
 
 ### Features
 
-The program does the following procedures:
+**NOTE**: See sample JSON data: [Get file](sample_dataset.json)
+
+To summarize, the program does the following procedures for listed URLs:
 
 - Gets domain registrar
 - Gets webpage title and automatically compares it to the domain registrar name
@@ -62,9 +64,17 @@ The following screenshots are generated with `matplotlib`
 
 ![](screenshots/domain_figure_tsfi.png)
 
-## Sample data
+## Known bugs issues and missing features
+
+- Non-UTF-8 character decoding not implemented
+
+- If multiple JSON data files exist, a wrong JSON data file is likely selected
+
+- Get URLs and other parameters from command line
+
+- More data visualization and compherensive analysis
 
-- `JSON sample data`: [Get file](sample_dataset.json)
+- Null data may be generated in some cases
 
 ## License