diff --git a/CHANGELOG.md b/CHANGELOG.md
index 92c412d7..49434e8a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ Version 286:
 * Fix missing include in sha1.hpp
 * Fix ostream warning
 * Field digest is endian-independent
+* update broken links in README
 
 API Changes:
 
diff --git a/README.md b/README.md
index aa7092bd..cf114e78 100644
--- a/README.md
+++ b/README.md
@@ -263,12 +263,12 @@ Here are some resources to learn more about
 code reviews:
 
 * <a href="https://blog.scottnonnenberg.com/top-ten-pull-request-review-mistakes/">Top 10 Pull Request Review Mistakes</a>
-* <a href="https://smartbear.com/SmartBear/media/pdfs/best-kept-secrets-of-peer-code-review.pdf">Best Kept Secrets of Peer Code Review (pdf)</a>
-* <a href="http://support.smartbear.com/support/media/resources/cc/11_Best_Practices_for_Peer_Code_Review.pdf">11 Best Practices for Peer Code Review (pdf)</a>
+* <a href="https://static1.smartbear.co/smartbear/media/pdfs/best-kept-secrets-of-peer-code-review_redirected.pdf">Best Kept Secrets of Peer Code Review (pdf)</a>
+* <a href="https://static1.smartbear.co/support/media/resources/cc/11_best_practices_for_peer_code_review_redirected.pdf">11 Best Practices for Peer Code Review (pdf)</a>
 * <a href="http://www.evoketechnologies.com/blog/code-review-checklist-perform-effective-code-reviews/">Code Review Checklist – To Perform Effective Code Reviews</a>
 * <a href="https://www.codeproject.com/Articles/524235/Codeplusreviewplusguidelines">Code review guidelines</a>
 * <a href="https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md">C++ Core Guidelines</a>
-* <a href="https://doc.lagout.org/programmation/C/CPP101.pdf">C++ Coding Standards (Sutter & Andrescu)</a>
+* <a href="https://www.oreilly.com/library/view/c-coding-standards/0321113586/">C++ Coding Standards (Sutter & Andrescu)</a>
 
 Beast thrives on code reviews and any sort of feedback from users and
 stakeholders about its interfaces. Even if you just have questions,