diff --git a/courses/free-courses-bn.md b/courses/free-courses-bn.md
index 3a0bc9bea..69958f056 100644
--- a/courses/free-courses-bn.md
+++ b/courses/free-courses-bn.md
@@ -298,6 +298,7 @@
 
 ### Operating Systems
 
+* [Operating System](https://www.youtube.com/playlist?list=PLgrAmbRAezujiknEO3sqpyCC4K3IgS4KU) - Farhan Hossan
 * [Operating System (OS) Bangla Tutorial (কমপ্লিট কোর্স)](https://www.youtube.com/playlist?list=PLncy2sD7w4Yr3ZbiP_ipAjgjDRn86N_tT) - Lecturelia - CSE Bangla Tutorial