diff --git a/README.md b/README.md
index 0f827af..84b724a 100644
--- a/README.md
+++ b/README.md
@@ -167,7 +167,7 @@ write_files:
     permissions: 744
     content: |
       #!/bin/sh
-      gunicorn --bind 0.0.0.0:${PORT:-8000} ${GUNICORN} --preload --access-logfile - --daemon morss
+      gunicorn --bind 0.0.0.0:${PORT:-8000} --preload --access-logfile - --daemon morss
 
 runcmd:
   - update-ca-certificates
@@ -491,6 +491,9 @@ entries. NB. When using `diskcache`, this is the cache max size in Bytes.
 - `CACHE_LIFESPAN` (seconds) sets how often the cache must be trimmed (i.e. cut
 down to the number of items set in `CACHE_SIZE`). Defaults to 1min.
 
+Gunicorn also accepts command line arguments via the `GUNICORN_CMD_ARGS`
+environment variable.
+
 ### Content matching
 
 The content of articles is grabbed with our own readability fork. This means
diff --git a/app.json b/app.json
index 9c93f3c..46e587e 100644
--- a/app.json
+++ b/app.json
@@ -5,7 +5,7 @@
 			"value": 1,
 			"required": false
 		},
-		"GUNICORN": {
+		"GUNICORN_CMD_ARGS": {
 			"value": "",
 			"required": false
 		},
diff --git a/docker-entry.sh b/docker-entry.sh
old mode 100755
new mode 100644
index 36f96d3..666d80b
--- a/docker-entry.sh
+++ b/docker-entry.sh
@@ -4,7 +4,7 @@ if [ "$1" = "sh" ] || [ "$1" = "bash" ]; then
 	exec $@
 
 elif [ -z "$1" ] || [ "$@" = "run" ]; then
-	gunicorn --bind 0.0.0.0:${PORT:-8000} ${GUNICORN} --preload --access-logfile - morss
+	gunicorn --bind 0.0.0.0:${PORT:-8000} --preload --access-logfile - morss
 
 else
 	morss $@