diff --git a/extras/courses.md b/extras/courses.md
index 6968462..c1e34bc 100644
--- a/extras/courses.md
+++ b/extras/courses.md
@@ -133,8 +133,10 @@ Courses | Duration | Effort
 ### Security
 Courses | Duration | Effort
 :-- | :--: | :--:
+[Usable Security](https://www.coursera.org/learn/usable-security/)| 7 weeks | 5-8 hours/week
+[Software Security](https://www.coursera.org/learn/software-security/)| 6 weeks | 3-5 hours/week
 [Cybersecurity and Its Ten Domains](https://www.coursera.org/learn/cyber-security-domain/)| 7 weeks | 4-7 hours/week
-
+[Designing and Executing Information Security Strategies](https://www.coursera.org/course/infosec)| 10 weeks | 4-6 hours/week
 ### Compilers
 
 ### Parallel Computing