diff --git a/.cspell/tools.txt b/.cspell/tools.txt
index fbe515cd..37cb3681 100644
--- a/.cspell/tools.txt
+++ b/.cspell/tools.txt
@@ -30,6 +30,7 @@ icudtl
 inkscape
 intellij
 jetbrains
+jsonpatch
 jvmargs
 klass
 lcov
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0c67f962..0797d3b6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -11,11 +11,16 @@ Currently included are:
 To set up all these tools run the `./tool/setup.sh` script.
 Note that you need to have Dart installed and [`~/.pub-cache/bin/` needs to be in your PATH](https://dart.dev/tools/pub/cmd/pub-global#running-a-script-from-your-path) before running the script.
 
-You will need to have the following packages installed:
+You will need to have the following dependencies installed to get the app running:
 - [yq](https://github.com/kislyuk/yq)
 - [sqlite3](https://pub.dev/packages/sqflite_common_ffi#getting-started)
 - [appindicator3](https://pub.dev/packages/tray_manager#quick-start)
 
+For working with lower levels like generating the OpenAPI specifications a few more dependencies are required:
+- [jsonpatch](https://pypi.org/project/jsonpatch)
+- [PHP](https://www.php.net)
+- [composer](https://getcomposer.org)
+
 ## Picking an issue
 You may wish to start with our list of [good first issues](https://github.com/nextcloud/neon/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22)
 
diff --git a/tool/generate-specs.sh b/tool/generate-specs.sh
index 3680fea0..1bdfc4b5 100755
--- a/tool/generate-specs.sh
+++ b/tool/generate-specs.sh
@@ -50,6 +50,17 @@ done
   generate_spec "." "notifications"
 )
 
+for spec in packages/nextcloud/lib/src/api/*.openapi.json; do
+  name="$(basename "$spec" | cut -d "." -f 1)"
+  dir="packages/nextcloud/lib/src/patches/$name"
+  if [ -d "$dir" ]; then
+    for patch in "$dir/"*; do
+      cp "$spec" "/tmp/nextcloud-neon/$name.json"
+      jsonpatch --indent 4 "/tmp/nextcloud-neon/$name.json" "$patch" > "$spec"
+    done
+  fi
+done
+
 (
   cd external/nextcloud-server
   composer exec merge-specs -- --core ../../packages/nextcloud/lib/src/api/core.openapi.json --merged /tmp/nextcloud-neon/merged.json ../../packages/nextcloud/lib/src/api/*.openapi.json --openapi-version 3.1.0