diff --git a/Dockerfile b/Dockerfile
index b1c5b7d..e40c2cf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM alpine:edge
 
 VOLUME /data
 
-RUN apk add --no-cache git bash
+RUN apk add --no-cache git bash openssh
 
 ADD checker/* src/* /usr/local/bin/
 
diff --git a/checker/cloner-lib-auth b/checker/cloner-lib-auth
index 86280fd..0c021ce 100644
--- a/checker/cloner-lib-auth
+++ b/checker/cloner-lib-auth
@@ -13,6 +13,6 @@ function prepareGitAuth(){
 	# git configure http authenticator
 	git config --global credential.helper "store --file=$confdir/git-credentials"
 	# git configure ssh auth
-	git config --global core.sshcommand "ssh -i $confdir/ssh/id_rsa -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o BatchMode=yes"
+	git config --global core.sshcommand "ssh -i $confdir/ssh/id_rsa -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o BatchMode=yes -q"
 }