diff --git a/ot-recorder/Dockerfile b/ot-recorder/Dockerfile
index 2bbf792..1de78c4 100644
--- a/ot-recorder/Dockerfile
+++ b/ot-recorder/Dockerfile
@@ -15,9 +15,9 @@ RUN set -xe \
     && rm -rf /var/lib/apt/lists/*
 
 ENV OTR_STORAGEDIR /var/spool/owntracks/recorder/store
-ENV OTR_TOPICS     owntracks/#
 ENV OTR_HOST       iot.eclipse.org
 ENV OTR_PORT       1883
+ENV OTR_TOPICS     owntracks/#
 
 VOLUME $OTR_STORAGEDIR
 
diff --git a/ot-recorder/README.md b/ot-recorder/README.md
index 56fc37e..3d92b0c 100644
--- a/ot-recorder/README.md
+++ b/ot-recorder/README.md
@@ -13,7 +13,15 @@ ot-recorder:
     - "8083:8083"
   volumes:
     - ./data:/var/spool/owntracks/recorder/store
+  environment:
+    - OTR_HOST=iot.eclipse.org
+    - OTR_PORT=1883
+    - OTR_TOPICS=owntracks/username/#
+    - OTR_OPTIONS=--browser-apikey XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
   restart: always
 ```
 
+Click [this][2] to generate a google map api key.
+
 [1]: https://github.com/owntracks/recorder
+[2]: https://developers.google.com/maps/documentation/javascript/?authuser=1
diff --git a/ot-recorder/arm/Dockerfile b/ot-recorder/arm/Dockerfile
index 71158d6..b730cf3 100644
--- a/ot-recorder/arm/Dockerfile
+++ b/ot-recorder/arm/Dockerfile
@@ -15,9 +15,9 @@ RUN set -xe \
     && rm -rf /var/lib/apt/lists/*
 
 ENV OTR_STORAGEDIR /var/spool/owntracks/recorder/store
-ENV OTR_TOPICS     owntracks/#
 ENV OTR_HOST       iot.eclipse.org
 ENV OTR_PORT       1883
+ENV OTR_TOPICS     owntracks/#
 
 VOLUME $OTR_STORAGEDIR
 
diff --git a/ot-recorder/arm/docker-compose.yml b/ot-recorder/arm/docker-compose.yml
index 8927e37..21d0b23 100644
--- a/ot-recorder/arm/docker-compose.yml
+++ b/ot-recorder/arm/docker-compose.yml
@@ -4,4 +4,9 @@ ot-recorder:
     - "8083:8083"
   volumes:
     - ./data:/var/spool/owntracks/recorder/store
+  environment:
+    - OTR_HOST=iot.eclipse.org
+    - OTR_PORT=1883
+    - OTR_TOPICS=owntracks/username/#
+    - OTR_OPTIONS=--browser-apikey XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
   restart: always
diff --git a/ot-recorder/arm/docker-entrypoint.sh b/ot-recorder/arm/docker-entrypoint.sh
index 6ebc8f5..9b3bf38 100755
--- a/ot-recorder/arm/docker-entrypoint.sh
+++ b/ot-recorder/arm/docker-entrypoint.sh
@@ -10,4 +10,4 @@ then
     ot-recorder --initialize
 fi
 
-exec ot-recorder --http-host 0.0.0.0 $OTR_TOPICS
+exec ot-recorder --http-host 0.0.0.0 $OTR_OPTIONS $OTR_TOPICS
diff --git a/ot-recorder/docker-compose.yml b/ot-recorder/docker-compose.yml
index e109507..1add65a 100644
--- a/ot-recorder/docker-compose.yml
+++ b/ot-recorder/docker-compose.yml
@@ -4,4 +4,9 @@ ot-recorder:
     - "8083:8083"
   volumes:
     - ./data:/var/spool/owntracks/recorder/store
+  environment:
+    - OTR_HOST=iot.eclipse.org
+    - OTR_PORT=1883
+    - OTR_TOPICS=owntracks/username/#
+    - OTR_OPTIONS=--browser-apikey XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
   restart: always
diff --git a/ot-recorder/docker-entrypoint.sh b/ot-recorder/docker-entrypoint.sh
index 6ebc8f5..9b3bf38 100755
--- a/ot-recorder/docker-entrypoint.sh
+++ b/ot-recorder/docker-entrypoint.sh
@@ -10,4 +10,4 @@ then
     ot-recorder --initialize
 fi
 
-exec ot-recorder --http-host 0.0.0.0 $OTR_TOPICS
+exec ot-recorder --http-host 0.0.0.0 $OTR_OPTIONS $OTR_TOPICS