diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 9747998..812df28 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -457,7 +457,7 @@
 .. _`Camellia page`: https://info.isl.ntt.co.jp/crypt/eng/camellia/
 .. _`CRYPTREC`: https://www.cryptrec.go.jp
 .. _`OpenSSL's test vectors`: https://github.com/openssl/openssl/blob/97cf1f6c2854a3a955fd7dd3a1f113deba00c9ef/crypto/evp/evptests.txt#L232
-.. _`RIPEMD website`: http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
+.. _`RIPEMD website`: https://homes.esat.kuleuven.be/~bosselae/ripemd160.html
 .. _`Whirlpool website`: http://www.larc.usp.br/~pbarreto/WhirlpoolPage.html
 .. _`draft RFC`: https://tools.ietf.org/html/draft-josefsson-scrypt-kdf-01
 .. _`Specification repository`: https://github.com/fernet/spec
@@ -472,7 +472,7 @@
 .. _`GnuTLS example keys`: https://gitlab.com/gnutls/gnutls/commit/ad2061deafdd7db78fd405f9d143b0a7c579da7b
 .. _`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`: http://ed25519.cr.yp.to/software.html
+.. _`Ed25519 website`: https://ed25519.cr.yp.to/software.html
 .. _`NIST SP-800-38B`: http://csrc.nist.gov/publications/nistpubs/800-38B/Updated_CMAC_Examples.pdf
 .. _`NIST PKI Testing`: http://csrc.nist.gov/groups/ST/crypto_apps_infra/pki/pkitesting.html
 .. _`testx509.pem`: https://github.com/openssl/openssl/blob/master/test/testx509.pem