diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index e27490d..aa63278 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -521,7 +521,7 @@
 .. _`NESSIE IDEA vectors`: https://www.cosic.esat.kuleuven.be/nessie/testvectors/bc/idea/Idea-128-64.verified.test-vectors
 .. _`NESSIE`: https://en.wikipedia.org/wiki/NESSIE
 .. _`Ed25519 website`: https://ed25519.cr.yp.to/software.html
-.. _`NIST SP-800-38B`: http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38b.pdf
+.. _`NIST SP-800-38B`: https://csrc.nist.gov/publications/detail/sp/800-38b/archive/2005-05-01
 .. _`NIST PKI Testing`: https://csrc.nist.gov/Projects/PKI-Testing
 .. _`testx509.pem`: https://github.com/openssl/openssl/blob/master/test/testx509.pem
 .. _`DigiCert Global Root G3`: http://cacerts.digicert.com/DigiCertGlobalRootG3.crt
diff --git a/docs/hazmat/primitives/asymmetric/dsa.rst b/docs/hazmat/primitives/asymmetric/dsa.rst
index a608819..57b4a96 100644
--- a/docs/hazmat/primitives/asymmetric/dsa.rst
+++ b/docs/hazmat/primitives/asymmetric/dsa.rst
@@ -443,5 +443,5 @@
 
 .. _`DSA`: https://en.wikipedia.org/wiki/Digital_Signature_Algorithm
 .. _`public-key`: https://en.wikipedia.org/wiki/Public-key_cryptography
-.. _`FIPS 186-4`: http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf
+.. _`FIPS 186-4`: https://csrc.nist.gov/publications/detail/fips/186/4/final
 .. _`at least 2048`: http://www.ecrypt.eu.org/ecrypt2/documents/D.SPA.20.pdf
diff --git a/docs/hazmat/primitives/asymmetric/ec.rst b/docs/hazmat/primitives/asymmetric/ec.rst
index 6d02fdc..50c38e3 100644
--- a/docs/hazmat/primitives/asymmetric/ec.rst
+++ b/docs/hazmat/primitives/asymmetric/ec.rst
@@ -670,9 +670,9 @@
 
 
 .. _`FIPS 186-3`: https://csrc.nist.gov/csrc/media/publications/fips/186/3/archive/2009-06-25/documents/fips_186-3.pdf
-.. _`FIPS 186-4`: http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf
+.. _`FIPS 186-4`: https://csrc.nist.gov/publications/detail/fips/186/4/final
 .. _`800-56A`: https://csrc.nist.gov/publications/detail/sp/800-56a/revised/archive/2007-03-14
-.. _`800-56Ar2`: http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-56Ar2.pdf
+.. _`800-56Ar2`: https://csrc.nist.gov/publications/detail/sp/800-56a/rev-2/final
 .. _`some concern`: https://crypto.stackexchange.com/questions/10263/should-we-trust-the-nist-recommended-ecc-parameters
 .. _`less than 224 bits`: http://www.ecrypt.eu.org/ecrypt2/documents/D.SPA.20.pdf
 .. _`elliptic curve diffie-hellman is faster than diffie-hellman`: http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1100&context=cseconfwork
diff --git a/docs/hazmat/primitives/key-derivation-functions.rst b/docs/hazmat/primitives/key-derivation-functions.rst
index ea5f3f8..0196e43 100644
--- a/docs/hazmat/primitives/key-derivation-functions.rst
+++ b/docs/hazmat/primitives/key-derivation-functions.rst
@@ -897,9 +897,9 @@
 
 .. [#nist] See `NIST SP 800-132`_.
 
-.. _`NIST SP 800-132`: http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf
-.. _`NIST SP 800-108`: http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-108.pdf
-.. _`NIST SP 800-56Ar2`: http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-56Ar2.pdf
+.. _`NIST SP 800-132`: https://csrc.nist.gov/publications/detail/sp/800-132/final
+.. _`NIST SP 800-108`: https://csrc.nist.gov/publications/detail/sp/800-108/final
+.. _`NIST SP 800-56Ar2`: https://csrc.nist.gov/publications/detail/sp/800-56a/rev-2/final
 .. _`ANSI X9.63:2001`: https://webstore.ansi.org
 .. _`SEC 1 v2.0`: http://www.secg.org/sec1-v2.pdf
 .. _`Password Storage Cheat Sheet`: https://www.owasp.org/index.php/Password_Storage_Cheat_Sheet
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst
index 822c6a8..d6479a4 100644
--- a/docs/hazmat/primitives/symmetric-encryption.rst
+++ b/docs/hazmat/primitives/symmetric-encryption.rst
@@ -710,7 +710,7 @@
 
 .. _`described by Colin Percival`: http://www.daemonology.net/blog/2009-06-11-cryptographic-right-answers.html
 .. _`recommends a 96-bit IV length`: https://csrc.nist.gov/publications/detail/sp/800-38d/final
-.. _`NIST SP-800-38D`: http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38D.pdf
+.. _`NIST SP-800-38D`: https://csrc.nist.gov/publications/detail/sp/800-38d/final
 .. _`Communications Security Establishment`: https://www.cse-cst.gc.ca
 .. _`encrypt`: https://ssd.eff.org/en/module/what-encryption
 .. _`CRYPTREC`: https://www.cryptrec.go.jp/english/