diff --git a/docker/.env b/docker/.env
index 7988b71f1..d5acaad66 100644
--- a/docker/.env
+++ b/docker/.env
@@ -115,7 +115,7 @@ RAGFLOW_IMAGE=infiniflow/ragflow:v0.20.4-slim
 # RAGFLOW_IMAGE=registry.cn-hangzhou.aliyuncs.com/infiniflow/ragflow:nightly
 
 # The local time zone.
-TIMEZONE='Asia/Shanghai'
+TIMEZONE=Asia/Shanghai
 
 # Uncomment the following line if you have limited access to huggingface.co:
 # HF_ENDPOINT=https://hf-mirror.com