diff --git a/Dockerfile b/Dockerfile
index cf7d1a0..b130963 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,7 @@ RUN addgroup synapse
 RUN adduser -h /var/lib/synapse -D -G synapse synapse
 
 RUN apk add --no-cache \
+    openssl \
     bash \
     coreutils \
     curl \
diff --git a/rootfs/etc/cont-init.d/synapse-keys b/rootfs/etc/cont-init.d/synapse-keys
index 8f9f2ab..ce375f8 100644
--- a/rootfs/etc/cont-init.d/synapse-keys
+++ b/rootfs/etc/cont-init.d/synapse-keys
@@ -2,7 +2,7 @@
 
 if [ ! -f /var/lib/synapse/signing/signing.key ]; then
     source /var/lib/synapse/bin/activate
-    s6-setuidgid synapse python -B -m synapse.app.homeserver -c server.yaml --generate-config --report-stats=no
+    s6-setuidgid synapse python -B -m synapse.app.homeserver -c server.yaml --generate-config -H $SERVER_NAME --report-stats=no
 fi
 
 if [ ! -f /var/lib/synapse/signing/dhparams.pem ]; then