diff --git a/docker-compose.yml b/docker-compose.yml
index 2b11f87..6a5a4a6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -42,21 +42,21 @@ services:
     command:
       - web
     environment:
-      - NUM_WORKERS=2
+      - NUM_WORKERS=1
 
   pretix-task-queue:
     <<: *pretix-base
     command:
       - taskworker
       - --concurrency
-      - 2
+      - 1
     environment:
       - AUTOMIGRATE=skip # migration is run by the web worker
 
   # Pretalx
   pretalx:
     <<: *service-defaults
-    image: harbor.aalen.space/sfz.aalen/infra/images/pretalx-ctbk:1741346032
+    image: git.ctbk.de/infra/pretalx-ctbk:2025.2.3
     depends_on: [valkey]
     restart: always
     ports:
@@ -77,7 +77,10 @@ services:
       TZ: Europe/Berlin
       # testing for limited memory
       GUNICORN_WORKERS: "1"
-      NUM_WORKERS: "2"
+      NUM_WORKERS: "1"
+    # more testing
+    command:
+      - webworker
     env_file: ".env-pretalx"
 
   # Cache databases