diff --git a/Dockerfile b/Dockerfile
index 2eeabe5..df2abc7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,6 @@ FROM ibm-semeru-runtimes:open-21-jre
 WORKDIR /app
 COPY --from=build /app/target/Jetbrains-Help.jar Jetbrains-Help.jar
 ENV TZ=Asia/Shanghai
-RUN ln -sf /usr/share/zoneinfo/{TZ} /etc/localtime && echo "{TZ}" > /etc/timezone
+RUN ln -sf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 EXPOSE 10768
 ENTRYPOINT ["java", "-jar", "Jetbrains-Help.jar"]
\ No newline at end of file