diff --git a/package/Dockerfile.centos b/package/Dockerfile.centos
index 8304f820..babbc0c7 100644
--- a/package/Dockerfile.centos
+++ b/package/Dockerfile.centos
@@ -2,9 +2,6 @@
 FROM centos:7
 LABEL Description="CORE CentOS Image"
 
-# define environment
-ENV DEBIAN_FRONTEND=noninteractive
-
 # install basic dependencies
 RUN yum update -y && yum install -y python3 python3-pip python3-tkinter
 RUN python3 -m pip install --upgrade pip