diff --git a/docs/requirements.txt b/docs/requirements.txt
index 7c3e4d5..6cceae1 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,6 +3,6 @@ PyQt5
 pyvtk
 calfem-python
 ipython_genutils==0.1.0
-sphinx==4.0.2
-nbsphinx==0.8.6
+sphinx==6.1
+nbsphinx==0.9.3
 sphinx-material
diff --git a/docs/source/conf.py b/docs/source/conf.py
index ef06dfd..7cea451 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -52,7 +52,7 @@
 
 # General information about the project.
 project = 'CALFEM for Python'
-copyright = '2016-2022, Jonas Lindemann'
+copyright = '2016-2024, Jonas Lindemann'
 author = 'Jonas Lindemann et al'
 
 # The version info for the project you're documenting, acts as replacement for
@@ -62,7 +62,7 @@
 # The short X.Y version.
 version = '3.6'
 # The full version, including alpha/beta/rc tags.
-release = '3.6.3'
+release = '3.6.8'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.