diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ed6fbddd72e76ca4f1213555803cee03342fc8c..3ea088fd0a6811089514f8039c3b62a84bba11ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 :arrow_left: [Back to main page](./README.md)
 
+-   June 24, 2024: Major summer cleanup with Version 5.5. [\@tlunet](https://github.com/tlunet) extracted all quadrature-related stuff into his new standalone code 
+    [qmat](https://github.com/Parallel-in-Time/qmat), which makes pySDC much more focussed and both parts easier to maintain. 
+    [\@lisawim](https://github.com/lisawim) worked a lot on the DAE sweepers (including an MPI-parallel version), while [\@brownbaerchen](https://github.com/brownbaerchen) has fun with GPUs.
+    We also appreciate [\@jakob-fritz](https://github.com/jakob-fritz) working hard on improving the CI pipeline.
 -   January 24, 2024: Version 5.4.0 contains the code for the [second order SDC paper](https://arxiv.org/abs/2310.08352) by [\@ikrom96git](https://github.com/ikrom96git). It also has some changes to the FEniCS
     part, including correct treatment of boundary conditions and first steps with FEniCS-x.
 -   July 28, 2023: For Version 5.3 a lot of pull requests got merged, thanks to [\@brownbaerchen](https://github.com/brownbaerchen),
diff --git a/CITATION.cff b/CITATION.cff
index 8616ff5c073211f856aefe061f33c9cd56b57943..20cec2e912f5823a145129ce79a573c1f99abd93 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -20,10 +20,14 @@ authors:
     given-names: Ikrom
     orcid: https://orcid.org/0000-0002-8869-0784
     affiliation: "Hamburg University of Technology, Institute of Mathematics, 21073 Hamburg, Germany"
+  - family-names: Fritz
+    given-names: Jakob
+    orcid: https://orcid.org/0000-0001-6280-8396
+    affiliation: "Jülich Supercomputing Centre, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany"
 
-version: 5.4.3
+version: 5.5.0
 doi: 10.5281/zenodo.594191
-date-released: 2024-03-27
+date-released: 2024-06-24
 keywords: 
   - "parallel-in-time"
   - "spectral deferred corrections"
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 5687b3ea3597724b9598c21448cefb064485915f..998619bb7243e770f4c0c1f8a623f28080e1f691 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -70,9 +70,9 @@ author = 'Robert Speck, Thibaut Lunet, Thomas Baumann, Lisa Wimmer, Ikrom Akramo
 # built documents.
 #
 # The short X.Y version.
-version = '5.4'
+version = '5.5'
 # The full version, including alpha/beta/rc tags.
-release = '5.4.3'
+release = '5.5.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/pyproject.toml b/pyproject.toml
index b6016027e069050da75ff4b943669721977ea383..7663fd93d55ca842978a5d3e1fb28aea42872b43 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "flit_core.buildapi"
 
 [project]
 name = 'pySDC'
-version = '5.4.3'
+version = '5.5.0'
 description = 'A Python implementation of spectral deferred correction methods and the likes'
 license = {text = "BSD-2-Clause"}
 readme = 'README.md'
@@ -14,6 +14,7 @@ authors=[
     {name='Thomas Baumann', email='t.baumann@fz-juelich.de'},
     {name='Lisa Wimmer', email='wimmer@uni-wuppertal.de'},
     {name='Ikrom Akramov', email='ikrom.akramov@tuhh.de'},
+    {name='Jakob Fritz', email='j.fritz@fz-juelich.de'},
     ]