update some links with the redirects shown in the linkchecker
diff --git a/docs/development/submitting-patches.rst b/docs/development/submitting-patches.rst
index 6610584..563bc81 100644
--- a/docs/development/submitting-patches.rst
+++ b/docs/development/submitting-patches.rst
@@ -151,6 +151,6 @@
.. _`Write comments as complete sentences.`: http://nedbatchelder.com/blog/201401/comments_should_be_sentences.html
.. _`syntax`: http://sphinx-doc.org/domains.html#info-field-lists
-.. _`Studies have shown`: https://smartbear.com/smartbear/media/pdfs/wp-cc-11-best-practices-of-peer-code-review.pdf
+.. _`Studies have shown`: https://smartbear.com/SmartBear/media/pdfs/11_Best_Practices_for_Peer_Code_Review.pdf
.. _`our mailing list`: https://mail.python.org/mailman/listinfo/cryptography-dev
-.. _`doc8`: https://github.com/stackforge/doc8
+.. _`doc8`: https://github.com/openstack/doc8
diff --git a/docs/hazmat/bindings/openssl.rst b/docs/hazmat/bindings/openssl.rst
index 0ec0a3d..99cd7a4 100644
--- a/docs/hazmat/bindings/openssl.rst
+++ b/docs/hazmat/bindings/openssl.rst
@@ -46,4 +46,4 @@
.. _`CFFI`: https://cffi.readthedocs.org/
.. _`OpenSSL`: https://www.openssl.org/
-.. _`thread safety facilities`: https://www.openssl.org/docs/crypto/threads.html
+.. _`thread safety facilities`: https://www.openssl.org/docs/manmaster/crypto/threads.html
diff --git a/docs/limitations.rst b/docs/limitations.rst
index 0dfc49c..503bdfe 100644
--- a/docs/limitations.rst
+++ b/docs/limitations.rst
@@ -15,5 +15,5 @@
Likelihood: unlikely, Remediation Cost: expensive to repair" and we do not
consider this a high risk for most users.
-.. _`Memory wiping`: http://blogs.msdn.com/b/oldnewthing/archive/2013/05/29/10421912.aspx
+.. _`Memory wiping`: https://blogs.msdn.microsoft.com/oldnewthing/20130529-00/?p=4223/
.. _`CERT secure coding guidelines`: https://www.securecoding.cert.org/confluence/display/c/MEM03-C.+Clear+sensitive+information+stored+in+reusable+resources