diff --git a/README.md b/README.md
index 936ef2b..d86530a 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,13 @@ You can create companies, operate information about them, move airplanes between
 
 ## Demo
 
-![Demonstrating](images/swagger-ui.png)
+### Swagger UI
+
+![Swagger-UI](images/swagger-ui.png)
+
+### Postman Collection
+
+![Postman-Collection](images/postman-collection.png)
 
 ## Tech Stack
 
@@ -75,4 +81,8 @@ Wait until next message will be shown:
 Started AirCompaniesManagerApplication in 20 seconds
 ```
 
-7. Open browser and follow address: http://localhost:8088/api/swagger-ui.html
\ No newline at end of file
+7. Open browser and follow address: http://localhost:8088/api/swagger-ui.html
+
+Swagger UI added to demonstrate what endpoints does API contain.
+
+**To test API properly, please use this [Postman Collection](https://www.postman.com/spaceflight-architect-34290083/workspace/public-workspace/api/3d017b1a-8a36-4ff0-9c24-1aa68bd4606d).**
\ No newline at end of file
diff --git a/images/postman-collection.png b/images/postman-collection.png
new file mode 100644
index 0000000..3f9ecf4
Binary files /dev/null and b/images/postman-collection.png differ