diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 444521b..7097dc1 100644
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -1,13 +1,15 @@
 #!/bin/bash
 
 function setTimeZone {
-    CLIENT_TIMEZONE=$(cat /etc/timezone)
-    HOST_TIMEZONE=$(cat /etc/timezone.host)
+    if [ -f "/etc/timezone.host" ]; then
+        CLIENT_TIMEZONE=$(cat /etc/timezone)
+        HOST_TIMEZONE=$(cat /etc/timezone.host)
 
-    if [ "${CLIENT_TIMEZONE}" != "${HOST_TIMEZONE}" ]; then
-        echo "Reconfigure timezone to "${HOST_TIMEZONE}
-        echo ${HOST_TIMEZONE} > /etc/timezone
-        dpkg-reconfigure -f noninteractive tzdata
+        if [ "${CLIENT_TIMEZONE}" != "${HOST_TIMEZONE}" ]; then
+            echo "Reconfigure timezone to "${HOST_TIMEZONE}
+            echo ${HOST_TIMEZONE} > /etc/timezone
+            dpkg-reconfigure -f noninteractive tzdata
+        fi
     fi
 }