diff --git a/entrypoint.sh b/entrypoint.sh
index 259625a6..6cbfa470 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -10,6 +10,10 @@ if [ -z "${SUBSPACE_HTTP_HOST-}" ] ; then
     exit 1
 fi
 
+if [ -z "${NAMESERVER-}" ] ; then
+    export NAMESERVER="1.1.1.1"
+fi
+
 # Optional environment variables.
 if [ -z "${SUBSPACE_BACKLINK-}" ] ; then
     export SUBSPACE_BACKLINK=""
@@ -27,7 +31,6 @@ if [ -z "${SUBSPACE_HTTP_INSECURE-}" ] ; then
     export SUBSPACE_HTTP_INSECURE="false"
 fi
 
-export NAMESERVER="1.1.1.1"
 export DEBIAN_FRONTEND="noninteractive"
 
 # Set DNS server