diff --git a/Makefile b/Makefile
index b003f1e..153c8d1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 PACKER_VERSION ?= 1.2.0
-ANNOUNCE ?= udp://10.2.2.1:6969/announce
+ANNOUNCE ?= http://10.2.2.1:6969/announce
 WEBSEED ?= http://10.2.2.1
 
 PACKER_DOCKER_IMAGE = labsync-packer
diff --git a/docker-compose.yml b/docker-compose.yml
index 309d726..6f3da15 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,10 +6,10 @@ services:
     ports:
       - 10.2.2.1:80:80
     volumes:
-      - ./images:/usr/share/nginx/html
+      - ./images:/usr/share/nginx/html:ro
 
   opentracker:
     build: opentracker
     image: opentracker:alpine
     ports:
-      - 10.2.2.1:6969:6969/udp
+      - 10.2.2.1:6969:6969