diff --git a/compose.yml b/compose.yml
index 34ec8db..c84e3af 100644
--- a/compose.yml
+++ b/compose.yml
@@ -8,6 +8,20 @@
 # Syncthing itself runs on the host (not in this compose). Copy .env.example
 # to .env for local overrides (e.g. DATA_HOST_DIR=./data). Never commit .env.
 
+x-app-env: &app-env
+  DATA_DIR: /data
+  OUTPUT_COUNT: ${OUTPUT_COUNT:-3}
+  BLEND_OPACITY: ${BLEND_OPACITY:-30%}
+  BLEND_OPACITY_MIN: ${BLEND_OPACITY_MIN:-10}
+  BLEND_OPACITY_MAX: ${BLEND_OPACITY_MAX:-50}
+  FILTER_TIMEOUT: ${FILTER_TIMEOUT:-120}
+  FILTER_TIMEOUT_LONG: ${FILTER_TIMEOUT_LONG:-300}
+  MAX_FILTER_ATTEMPTS: ${MAX_FILTER_ATTEMPTS:-8}
+  MAX_EDGE_PX: ${MAX_EDGE_PX:-2000}
+  REMBG_MODEL: ${REMBG_MODEL:-u2net}
+  REMBG_ALPHA: ${REMBG_ALPHA:-1}
+  NICE_LEVEL: ${NICE_LEVEL:-18}
+
 services:
   worker:
     build: .
@@ -16,18 +30,7 @@ services:
     user: "1002:1002"
     command: ["python3", "-m", "app.worker"]
     environment:
-      DATA_DIR: /data
-      OUTPUT_COUNT: ${OUTPUT_COUNT:-3}
-      BLEND_OPACITY: ${BLEND_OPACITY:-30%}
-      BLEND_OPACITY_MIN: ${BLEND_OPACITY_MIN:-10}
-      BLEND_OPACITY_MAX: ${BLEND_OPACITY_MAX:-50}
-      FILTER_TIMEOUT: ${FILTER_TIMEOUT:-120}
-      FILTER_TIMEOUT_LONG: ${FILTER_TIMEOUT_LONG:-300}
-      MAX_FILTER_ATTEMPTS: ${MAX_FILTER_ATTEMPTS:-8}
-      MAX_EDGE_PX: ${MAX_EDGE_PX:-2000}
-      REMBG_MODEL: ${REMBG_MODEL:-u2net}
-      REMBG_ALPHA: ${REMBG_ALPHA:-1}
-      NICE_LEVEL: ${NICE_LEVEL:-18}
+      <<: *app-env
     volumes:
       - ${DATA_HOST_DIR:-/home/frank/sync.schwenk.online/data/livef12}:/data
       - ./assets:/data/assets:ro
@@ -48,18 +51,7 @@ services:
     depends_on:
       - worker
     environment:
-      DATA_DIR: /data
-      OUTPUT_COUNT: ${OUTPUT_COUNT:-3}
-      BLEND_OPACITY: ${BLEND_OPACITY:-30%}
-      BLEND_OPACITY_MIN: ${BLEND_OPACITY_MIN:-10}
-      BLEND_OPACITY_MAX: ${BLEND_OPACITY_MAX:-50}
-      FILTER_TIMEOUT: ${FILTER_TIMEOUT:-120}
-      FILTER_TIMEOUT_LONG: ${FILTER_TIMEOUT_LONG:-300}
-      MAX_FILTER_ATTEMPTS: ${MAX_FILTER_ATTEMPTS:-8}
-      MAX_EDGE_PX: ${MAX_EDGE_PX:-2000}
-      REMBG_MODEL: ${REMBG_MODEL:-u2net}
-      REMBG_ALPHA: ${REMBG_ALPHA:-1}
-      NICE_LEVEL: ${NICE_LEVEL:-18}
+      <<: *app-env
       SITE_TITLE: live.f12.rocks
     volumes:
       - ${DATA_HOST_DIR:-/home/frank/sync.schwenk.online/data/livef12}:/data