diff --git a/Dockerfile b/Dockerfile
index 5ccbbff..ef2b2e2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,4 +2,4 @@ FROM wernight/dante
 
 # TODO: Replace 'john' and 'MyPassword' by any username/password you want.
 ENV PASS MyPassword
-RUN printf '${PASS}\n${PASS}\n' | adduser john
+RUN printf "${PASS}\n${PASS}\n" | adduser john