diff --git a/README.md b/README.md
index 88f05fac..187734c5 100644
--- a/README.md
+++ b/README.md
@@ -214,7 +214,7 @@ docker run \
     	--volume /etc/letsencrypt/domains.conf:/etc/letsencrypt/domains.conf \
 	--volume /var/docker-data/letsencrypt:/etc/letsencrypt \
 	--volume /var/run/docker.sock:/var/run/docker.sock \
-    	--env 'LETSENCRYPT_USER_MAIL=admin@example.com' \
+    --env 'LETSENCRYPT_USER_MAIL=admin@example.com' \
 	--env 'LEXICON_PROVIDER=cloudflare' \
 	--env 'LEXICON_CLOUDFLARE_USERNAME=my_user' \
 	--env 'LEXICON_CLOUDFLARE_TOKEN=my_secret_token' \