diff --git a/mellon_create_metadata.sh b/mellon_create_metadata.sh
index c61b188..376d1d0 100755
--- a/mellon_create_metadata.sh
+++ b/mellon_create_metadata.sh
@@ -74,7 +74,7 @@ CERT="$(grep -v '^-----' "$OUTFILE.cert")"
 
 cat >"$OUTFILE.xml" <<EOF
 <EntityDescriptor entityID="$ENTITYID" xmlns="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
-  <SPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
+  <SPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol" AuthnRequestsSigned="true">
     <KeyDescriptor use="signing">
       <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
         <ds:X509Data>