diff --git a/Makefile b/Makefile
index d2de420..774155f 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,6 @@ COMPOSE := DOCKER_HOST=$(DOCKER_HOST) $(COMPOSE_CMD)
 psql:
 	$(COMPOSE) exec inventree-db sh -c 'psql $$POSTGRES_USER $$POSTGRES_DB'
 
-.PHONY: update
 update:
 	read -p "Update will cause downtime of the server. Are you sure you want to continue? Press Ctrl+c to abort!" _
 	$(COMPOSE) pull
@@ -18,14 +17,6 @@ update:
 data: # podman does not autocreate data folder
 	mkdir data
 
-.PHONY: caddy-check
-caddy-check:
-	docker run --rm --env-file .env -v ./Caddyfile:/etc/caddy/Caddyfile:ro,Z caddy:alpine caddy validate --config /etc/caddy/Caddyfile
-
-.PHONY: caddy-print
-caddy-print:
-	docker run --rm --env-file .env -v ./Caddyfile:/etc/caddy/Caddyfile:ro,Z caddy:alpine caddy adapt --config /etc/caddy/Caddyfile --pretty
-
 # pass all commands to compose cli
 %: data
 	$(COMPOSE) $@
diff --git a/compose.yml b/compose.yml
index 8008e84..a3b5474 100644
--- a/compose.yml
+++ b/compose.yml
@@ -113,8 +113,6 @@ services:
             - 443:443
         env_file:
             - .env
-        environment:
-          INVENTREE_SERVER: http://inventree-server:${INVENTREE_WEB_PORT}
         volumes:
             - ./Caddyfile:/etc/caddy/Caddyfile:ro,z
             - ${INVENTREE_EXT_VOLUME}/static:/var/www/static:z
diff --git a/plugins/ctbk_barcode.py b/plugins/ctbk_barcode.py
new file mode 100644
index 0000000..1e56125
--- /dev/null
+++ b/plugins/ctbk_barcode.py
@@ -0,0 +1,25 @@
+from plugin import InvenTreePlugin
+from plugin.mixins import BarcodeMixin
+from part.models import Part
+import structlog
+
+logger = structlog.get_logger("ctbk.barcode")
+
+
+class CtbkBarcodePlugin(BarcodeMixin, InvenTreePlugin):
+    TITLE = "CTBK IPN Barcode Plugin"
+    NAME = "ctbk-ipn-barcode-plugin"
+    DESCRIPTION = "Supports the CTBK IPN format directly in barcodes"
+    VERSION = "0.0.1"
+    AUTHOR = "kleines Filmröllchen"
+
+    def scan(self, barcode_data):
+        if barcode_data.startswith("963e5440-"):
+            try:
+                instance = Part.objects.get(IPN=barcode_data.strip())
+                label = Part.barcode_model_type()
+
+                return {label: instance.format_matched_response()}
+            except Part.DoesNotExist:
+                logger.error("could not find a part for barcode %s", barcode_data)
+                pass