diff --git a/avatar-storage/add-avatar-resource-provider.sh b/avatar-storage/add-avatar-resource-provider.sh
index e672a29..0d3af3b 100755
--- a/avatar-storage/add-avatar-resource-provider.sh
+++ b/avatar-storage/add-avatar-resource-provider.sh
@@ -1 +1,2 @@
+#!/bin/bash
 $KEYCLOAK_HOME/bin/jboss-cli.sh --connect --controller=${1-localhost:9990} --command="/subsystem=keycloak-server:list-add(name=providers, value=module:org.gcube.keycloak.avatar-storage)"
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