diff --git a/Dockerfile b/Dockerfile
index 2664770e..e79fd022 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -46,9 +46,9 @@ COPY --chmod=744 ./web/nginx.conf /etc/nginx/sites-enabled/web.conf
 VOLUME /storage
 EXPOSE 22 5900 8006
 
-ENV CPU_CORES "1"
-ENV RAM_SIZE "1G"
-ENV DISK_SIZE "16G"
-ENV BOOT "http://example.com/image.iso"
+ENV CPU_CORES="1"
+ENV RAM_SIZE="1G"
+ENV DISK_SIZE="16G"
+ENV BOOT="http://example.com/image.iso"
 
 ENTRYPOINT ["/usr/bin/tini", "-s", "/run/entry.sh"]