diff --git a/docs/Makefile b/docs/Makefile
index 9f906d9..c949151 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -9,7 +9,7 @@ BUILDDIR      = _build
 
 # User-friendly check for sphinx-build
 ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
-$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
+$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from https://sphinx-doc.org/)
 endif
 
 # Internal variables.
diff --git a/docs/backends.rst b/docs/backends.rst
index 7700f75..547d8cb 100644
--- a/docs/backends.rst
+++ b/docs/backends.rst
@@ -60,7 +60,7 @@ An (optional) dotted import path to a connection to use, e.g.::
 
     CONSTANCE_REDIS_CONNECTION_CLASS = 'myproject.myapp.mockup.Connection'
 
-If you are using `django-redis <http://niwinz.github.io/django-redis/latest/>`_,
+If you are using `django-redis <https://niwinz.github.io/django-redis/latest/>`_,
 feel free to use the ``CONSTANCE_REDIS_CONNECTION_CLASS`` setting to define
 a callable that returns a redis connection, e.g.::
 
@@ -175,7 +175,7 @@ configured cache backend to enable this feature, e.g. "default"::
           simply set the :setting:`CONSTANCE_DATABASE_CACHE_AUTOFILL_TIMEOUT`
           setting to ``None``.
 
-.. _django-picklefield: http://pypi.python.org/pypi/django-picklefield/
+.. _django-picklefield: https://pypi.org/project/django-picklefield/
 
 Memory
 ------
diff --git a/docs/conf.py b/docs/conf.py
index 2f87585..1cbb8c8 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -260,7 +260,7 @@ texinfo_documents = [
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    'http://docs.python.org/': None,
-    'django': ('http://docs.djangoproject.com/en/dev/',
-               'http://docs.djangoproject.com/en/dev/_objects/'),
+    'https://docs.python.org/': None,
+    'django': ('https://docs.djangoproject.com/en/dev/',
+               'https://docs.djangoproject.com/en/dev/_objects/'),
 }
diff --git a/docs/index.rst b/docs/index.rst
index 13f4cb1..64efc4b 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -47,7 +47,7 @@ the :setting:`CONSTANCE_CONFIG` section, like this:
 .. note:: Add constance *before* your project apps.
 
 .. note::  If you use admin extensions like
-   `Grapelli <http://grappelliproject.com/>`_, ``'constance'`` should be added
+   `Grapelli <https://grappelliproject.com/>`_, ``'constance'`` should be added
    in :setting:`INSTALLED_APPS` *before* those extensions.
 
 Here, ``42`` is the default value for the key ``THE_ANSWER`` if it is
diff --git a/docs/make.bat b/docs/make.bat
index 5b5f2a6..747c67e 100644
--- a/docs/make.bat
+++ b/docs/make.bat
@@ -56,7 +56,7 @@ if errorlevel 9009 (
 	echo.may add the Sphinx directory to PATH.
 	echo.
 	echo.If you don't have Sphinx installed, grab it from
-	echo.http://sphinx-doc.org/
+	echo.https://sphinx-doc.org/
 	exit /b 1
 )