diff --git a/conf.py b/conf.py
index 0a0274a63..fd839c4a1 100644
--- a/conf.py
+++ b/conf.py
@@ -8,7 +8,7 @@ dir_path = os.path.dirname(os.path.realpath(__file__))
 sys.path.insert(0, os.path.abspath(dir_path + '/_ext'))
 now = datetime.datetime.now()
 
-extensions = ['sphinx_rtd_theme', 'sphinx_rtd_dark_mode', 'sphinx_copybutton']
+extensions = ['sphinx_rtd_theme', 'sphinx_rtd_dark_mode', 'sphinx_copybutton', 'sphinxcontrib.mermaid']
 
 # General information about the project.
 copyright = str(now.year) + ' Nextcloud GmbH'
diff --git a/requirements.txt b/requirements.txt
index 87affda8a..b392a20ab 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,6 +26,7 @@ sphinxcontrib-devhelp==2.0.0
 sphinxcontrib-htmlhelp==2.1.0
 sphinxcontrib-jquery==4.1
 sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-mermaid==0.9.2
 sphinxcontrib-phpdomain==0.12.0
 sphinxcontrib-qthelp==2.0.0
 sphinxcontrib-serializinghtml==2.0.0