diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 3bc1448136ea4d..fcf4aeba2beb68 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -2266,7 +2266,7 @@ Basic customization
       This is intended to provide protection against a denial-of-service caused
       by carefully chosen inputs that exploit the worst case performance of a
       dict insertion, *O*\ (*n*\ :sup:`2`) complexity.  See
-      http://ocert.org/advisories/ocert-2011-003.html for details.
+      https://ocert.org/advisories/ocert-2011-003.html for details.
 
       Changing hash values affects the iteration order of sets.
       Python has never made guarantees about this ordering
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 24541e84732faf..2be0afa887183c 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -381,7 +381,7 @@ Miscellaneous options
    Hash randomization is intended to provide protection against a
    denial-of-service caused by carefully chosen inputs that exploit the worst
    case performance of a dict construction, *O*\ (*n*\ :sup:`2`) complexity.  See
-   http://ocert.org/advisories/ocert-2011-003.html for details.
+   https://ocert.org/advisories/ocert-2011-003.html for details.
 
    :envvar:`PYTHONHASHSEED` allows you to set a fixed value for the hash
    seed secret.