diff --git a/yaml/Dockerfile b/yaml/Dockerfile
index 3adc029..9c2d182 100644
--- a/yaml/Dockerfile
+++ b/yaml/Dockerfile
@@ -26,7 +26,7 @@ RUN adduser \
   --disabled-password \
   "${USER_NAME}"
 
-ENV HOME "${USER_HOME}"
+ENV HOME="${USER_HOME}"
 
 USER "${USER_NAME}"