diff --git a/scripts/generate_ephemeral_keys.sh b/scripts/generate_ephemeral_keys.sh
index 05e79374dcc711ccd937a24c068ff3474315d170..8b53a5d5600a9048d70980567df4cf6d5e616456 100755
--- a/scripts/generate_ephemeral_keys.sh
+++ b/scripts/generate_ephemeral_keys.sh
@@ -23,7 +23,7 @@ if [ ! -x "$CERTIFY" ] ; then
 fi
 
 echo '*** Generating ephemeral keys used for testing ***'
-$GENERATE_KEYPAIR -k 128 -a rsa
+$GENERATE_KEYPAIR -k 256 -a rsa
 mkdir -p $VAR
 
 # public key will be stored as a self signed certificate with an embedded