diff --git a/CHANGELOG.md b/CHANGELOG.md
index 029cdd157..34885d40a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Release Notes
 
-## 0.6.8 (unreleased)
+## 0.6.8 (07.06.2024)
 
 ### Changes
 
diff --git a/CITATION.cff b/CITATION.cff
index c01c1d645..1a037f90b 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,8 +1,8 @@
 # YAML 1.2
 ---
 title: weldx
-version: 0.6.7
-date-released: 2023-08-24
+version: 0.6.8
+date-released: 2024-07-06
 authors:
   - affiliation: "Bundesanstalt für Materialforschung und -prüfung (BAM)"
     email: cagtay.fabry@bam.de
diff --git a/doc/rtd_environment.yml b/doc/rtd_environment.yml
index 208f77011..295cc22de 100644
--- a/doc/rtd_environment.yml
+++ b/doc/rtd_environment.yml
@@ -21,13 +21,13 @@ dependencies:
   - weldx_widgets>=0.2.1
   # documentation
   - docutils>=0.19
-  - sphinx>=4.1.1
+  - sphinx>=4.1.1,=7.2
   - urllib3<2
   #- jinja2=3.0
-  - sphinx-copybutton
+  - sphinx-copybutton=0.5
   - pydata-sphinx-theme<0.15 # parallel-write-unsafe
   - numpydoc>=0.5
-  - sphinx-autodoc-typehints>=1.21.8
+  - sphinx-autodoc-typehints>=1.21.8,=2.0
   - typing_extensions
   # pip packages
   - pip
diff --git a/doc/src/tutorials.md b/doc/src/tutorials.md
index 33b168ad9..a834b05f6 100644
--- a/doc/src/tutorials.md
+++ b/doc/src/tutorials.md
@@ -10,7 +10,7 @@ data processing and visualization.
 ```{toctree}
 :caption: Welding examples
 :maxdepth: 1
-:numbered: true
+:numbered:
 
 tutorials/01_01_introduction
 tutorials/01_02_time_dependent_data
@@ -27,7 +27,7 @@ related tasks.
 ```{toctree}
 :caption: Welding examples
 :maxdepth: 1
-:numbered: true
+:numbered:
 
 tutorials/welding_example_01_basics
 tutorials/custom_metadata
@@ -45,7 +45,7 @@ The API tutorials provide more detailed usages and examples of core
 ```{toctree}
 :caption: API tutorials
 :maxdepth: 1
-:numbered: true
+:numbered:
 
 tutorials/transformations_01_coordinate_systems
 tutorials/transformations_02_coordinate_system_manager