diff --git a/README.md b/README.md
index c0f8b9b..69caf2c 100644
--- a/README.md
+++ b/README.md
@@ -154,6 +154,8 @@ For instance, take into account the snaptshot above. If you already know how to
         * [Coursera - Algorithms - Part 1 - Elementary data structures, sorting, and searching algorithms](https://www.coursera.org/learn/algorithms-part1) 🆓 🎓 📼
         * [Coursera - Algorithms - Part 2 - Graph and string-processing algorithms](https://www.coursera.org/learn/algorithms-part2) 🆓 🎓 📼
         * [Courated List of the 10 best free resources](https://medium.freecodecamp.org/these-are-the-best-free-courses-to-learn-data-structures-and-algorithms-in-depth-4d52f0d6b35a) 📰 🆓
+         * Locks
+           * [Let's talk locks! - Kavya Joshi](https://www.youtube.com/watch?v=tjpncm3xTTc) 📼 🆓
          * Alternative Data Structures
            * [“Esoteric Data Structures and Where to Find Them” - Allan Deutsch](https://www.youtube.com/watch?v=-8UZhDjgeZU) 📼 🆓
                 * 0:36 Slot map
diff --git a/resources/topic-graph.mmd b/resources/topic-graph.mmd
index a99fc4e..c3db52f 100644
--- a/resources/topic-graph.mmd
+++ b/resources/topic-graph.mmd
@@ -26,6 +26,7 @@ graph TD
       ALG --> SRT[Sorting]
       ALG --> CPX[Complexity]
     PT --> DS[Data Scructures]
+      DS --> Lock[Lock]
       DS --> Graph[Graph]
       DS --> T3[Tree]
       DS --> HS[Hash]
diff --git a/resources/topic-graph.png b/resources/topic-graph.png
index cbfd039..bfebea1 100644
Binary files a/resources/topic-graph.png and b/resources/topic-graph.png differ