diff --git a/Dockerfile b/Dockerfile
index 0139d10..c4eda79 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,9 @@ RUN chmod +x /etc/service/nginx/run && \
     chmod +x /etc/service/mirror/run
 
 RUN \
+    export GNUPGHOME=/etc/debmirror/ubuntu && \
+    mkdir -p $GNUPGHOME && \
+    chmod go-rwx $GNUPGHOME && \
     gpg --import /usr/share/keyrings/ubuntu-archive-keyring.gpg && \
     gpg --import /usr/share/keyrings/ubuntu-master-keyring.gpg
 
diff --git a/mirror/syncubuntu.sh b/mirror/syncubuntu.sh
index bd69c61..c59375f 100755
--- a/mirror/syncubuntu.sh
+++ b/mirror/syncubuntu.sh
@@ -4,6 +4,8 @@ set -x
 THISDIR="$(cd $(dirname "$BASH_SOURCE") && pwd -P)"
 DST="/var/mirror"
 
+export GNUPGHOME="/etc/debmirror/ubuntu"
+
 debmirror \
 	-a i386,amd64 \
 	--no-source \