Use HTTPS for a number of URLs in the docs
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst
index 586285b..b21ef61 100644
--- a/docs/hazmat/primitives/symmetric-encryption.rst
+++ b/docs/hazmat/primitives/symmetric-encryption.rst
@@ -510,6 +510,6 @@
.. _`Communications Security Establishment`: http://www.cse-cst.gc.ca
.. _`encrypt`: https://ssd.eff.org/tech/encryption
.. _`CRYPTREC`: http://www.cryptrec.go.jp/english/
-.. _`significant patterns in the output`: http://en.wikipedia.org/wiki/Cipher_block_chaining#Electronic_codebook_.28ECB.29
+.. _`significant patterns in the output`: https://en.wikipedia.org/wiki/Cipher_block_chaining#Electronic_codebook_.28ECB.29
.. _`International Data Encryption Algorithm`: https://en.wikipedia.org/wiki/International_Data_Encryption_Algorithm
.. _`OpenPGP`: http://www.openpgp.org