diff --git a/Makefile b/Makefile
index 871d328..92579b1 100644
--- a/Makefile
+++ b/Makefile
@@ -117,16 +117,18 @@ endif
 	docker push $(DEPLOY_ACCOUNT)/$(DEPLOY_IMAGE):$(tag)
 
 ssh-server:
-	adduser -h /home/drone-scp -s /bin/bash -D -S drone-scp
+	adduser -h /home/drone-scp -s /bin/sh -D -S drone-scp
 	echo drone-scp:1234 | chpasswd
 	mkdir -p /home/drone-scp/.ssh
 	chmod 700 /home/drone-scp/.ssh
 	cat tests/.ssh/id_rsa.pub >> /home/drone-scp/.ssh/authorized_keys
 	cat tests/.ssh/test.pub >> /home/drone-scp/.ssh/authorized_keys
+	chmod 600 /home/drone-scp/.ssh/authorized_keys
 	chown -R drone-scp /home/drone-scp/.ssh
 	# install ssh and start server
 	apk add --update openssh openrc
 	rm -rf /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_dsa_key
+	sed -i 's/^#PubkeyAuthentication yes/PubkeyAuthentication yes/g' /etc/ssh/sshd_config
 	sed -i 's/AllowTcpForwarding no/AllowTcpForwarding yes/g' /etc/ssh/sshd_config
 	./tests/entrypoint.sh /usr/sbin/sshd -D &