diff --git a/CITATION.cff b/CITATION.cff
index 571f2d2..26d4bb1 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -80,7 +80,6 @@ preferred-citation:
     family-names: Stokes
     affiliation: University Of Manchester
     orcid: https://orcid.org/0000-0002-6110-1484
-    website: http://www.cs.man.ac.uk/~stokesa6/
   - given-names: Steve B.
     family-names: Furber
     affiliation: University Of Manchester
@@ -90,14 +89,14 @@ preferred-citation:
 title: These are the examples typically used in the Introduction to PyNN talks.
 authors:
     - name: SpiNNaker Software Team
-      alias: For a list of contributors see https://github.com/SpiNNakerManchester/IntroLab/graphs/contributors or for a combined list see http://spinnakermanchester.github.io/latest/LicenseAgreement.html#contributors
+      alias: For a list of contributors see https://github.com/SpiNNakerManchester/IntroLab/graphs/contributors or for a combined list see https://spinnakermanchester.github.io/latest/LicenseAgreement.html#contributors
       address: University of Manchester, Oxford Road
       city: Manchester
       country: GB
       email: spinnakerusers@googlegroups.com
       post-code: M13 9PL
       website: https://apt.cs.manchester.ac.uk/projects/SpiNNaker/
-url: http://spinnakermanchester.github.io/
+url: https://spinnakermanchester.github.io/
 contact:
 - address: University of Manchester, Oxford Road
   city: Manchester
diff --git a/LICENSE_POLICY.md b/LICENSE_POLICY.md
index 833fb70..6103176 100644
--- a/LICENSE_POLICY.md
+++ b/LICENSE_POLICY.md
@@ -1,17 +1,17 @@
 # License Agreement
 
-Up to date information for the whole [SpiNNakerManchester Projects](https://github.com/SpiNNakerManchester) can be found [here](http://spinnakermanchester.github.io/latest/LicenseAgreement.html)
+Up to date information for the whole [SpiNNakerManchester Projects](https://github.com/SpiNNakerManchester) can be found [here](https://spinnakermanchester.github.io/latest/LicenseAgreement.html)
 
 As shown there the software is currently being released under the Apache License 2.0 listed [here](https://www.apache.org/licenses/LICENSE-2.0)
 
 
 # Paper Authorship
 
-See: [here](http://spinnakermanchester.github.io/latest/LicenseAgreement.html#paper-authorship)
+See: [here](https://spinnakermanchester.github.io/latest/LicenseAgreement.html#paper-authorship)
 
 # Modifications
 
-See: [here](http://spinnakermanchester.github.io/latest/LicenseAgreement.html#modifications)
+See: [here](https://spinnakermanchester.github.io/latest/LicenseAgreement.html#modifications)
 
 # Contributors
 
@@ -19,5 +19,5 @@ For up to date information on Contributors see the graphs/contributors pages on
 
 For example [https://github.com/SpiNNakerManchester/IntroLab/graphs/contributors](https://github.com/SpiNNakerManchester/IntroLab/graphs/contributors)
 
-[Combined list](http://spinnakermanchester.github.io/latest/LicenseAgreement.html#contributors)
+[Combined list](https://spinnakermanchester.github.io/latest/LicenseAgreement.html#contributors)
 
diff --git a/sudoku/sudoku.py b/sudoku/sudoku.py
index 65c874c..4f00717 100644
--- a/sudoku/sudoku.py
+++ b/sudoku/sudoku.py
@@ -171,7 +171,7 @@ def activate_visualiser(old_vis):
             [0, 2, 0,  0, 0, 7,  0, 5, 1]]
 elif puzzle == 6:
     # "World's hardest sudoku":
-    # http://www.telegraph.co.uk/news/science/science-news/9359579/\
+    # https://www.telegraph.co.uk/news/science/science-news/9359579/\
     # Worlds-hardest-sudoku-can-you-crack-it.html
     init = [[8, 0, 0,  0, 0, 0,  0, 0, 0],
             [0, 0, 3,  6, 0, 0,  0, 0, 0],