diff --git a/projects/portland-metro/docker-compose.yml b/projects/portland-metro/docker-compose.yml
index 205389f..c097090 100644
--- a/projects/portland-metro/docker-compose.yml
+++ b/projects/portland-metro/docker-compose.yml
@@ -7,12 +7,14 @@ services:
     image: pelias/libpostal-service
     container_name: pelias_libpostal
     user: "${DOCKER_USER}"
+    read_only: true
     restart: always
     ports: [ "4400:4400" ]
   schema:
     image: pelias/schema:portland-synonyms
     container_name: pelias_schema
     user: "${DOCKER_USER}"
+    read_only: true
     volumes:
       - "./pelias.json:/code/pelias.json"
       - "./synonyms/custom_name.txt:/code/pelias/schema/synonyms/custom_name.txt"
@@ -21,6 +23,7 @@ services:
     image: pelias/api:master
     container_name: pelias_api
     user: "${DOCKER_USER}"
+    read_only: true
     restart: always
     environment: [ "PORT=4000" ]
     ports: [ "4000:4000" ]
@@ -30,6 +33,7 @@ services:
     image: pelias/placeholder:master
     container_name: pelias_placeholder
     user: "${DOCKER_USER}"
+    read_only: true
     restart: always
     environment: [ "PORT=4100" ]
     ports: [ "4100:4100" ]
@@ -40,6 +44,7 @@ services:
     image: pelias/whosonfirst:master
     container_name: pelias_whosonfirst
     user: "${DOCKER_USER}"
+    read_only: true
     volumes:
       - "./pelias.json:/code/pelias.json"
       - "${DATA_DIR}:/data"
@@ -48,6 +53,7 @@ services:
     image: pelias/openstreetmap:master
     container_name: pelias_openstreetmap
     user: "${DOCKER_USER}"
+    read_only: true
     volumes:
       - "./pelias.json:/code/pelias.json"
       - "${DATA_DIR}:/data"
@@ -56,6 +62,7 @@ services:
     image: pelias/openaddresses:master
     container_name: pelias_openaddresses
     user: "${DOCKER_USER}"
+    read_only: true
     volumes:
       - "./pelias.json:/code/pelias.json"
       - "${DATA_DIR}:/data"
@@ -64,6 +71,7 @@ services:
     image: pelias/transit:master
     container_name: pelias_transit
     user: "${DOCKER_USER}"
+    read_only: true
     volumes:
       - "./pelias.json:/code/pelias.json"
       - "${DATA_DIR}:/data"
@@ -71,6 +79,7 @@ services:
     image: pelias/polylines:master
     container_name: pelias_polylines
     user: "${DOCKER_USER}"
+    read_only: true
     volumes:
       - "./pelias.json:/code/pelias.json"
       - "${DATA_DIR}:/data"
@@ -78,6 +87,7 @@ services:
     image: pelias/interpolation:master
     container_name: pelias_interpolation
     user: "${DOCKER_USER}"
+    read_only: true
     restart: always
     environment: [ "PORT=4300" ]
     ports: [ "4300:4300" ]
@@ -88,6 +98,7 @@ services:
     image: pelias/pip-service:master
     container_name: pelias_pip-service
     user: "${DOCKER_USER}"
+    read_only: true
     restart: always
     environment: [ "PORT=4200" ]
     ports: [ "4200:4200" ]
@@ -113,6 +124,7 @@ services:
     image: pelias/fuzzy-tester:master
     container_name: pelias_fuzzy_tester
     user: "${DOCKER_USER}"
+    read_only: true
     restart: "no"
     command: "--help"
     volumes: