diff --git a/make-cert.sh b/make-cert.sh
index c89855b..cbd489a 100755
--- a/make-cert.sh
+++ b/make-cert.sh
@@ -8,6 +8,7 @@
 CA_DIR="${CA_DIR:-./ca}"
 CA_NAME="${CA_NAME:-Azurite Emulator CA}"
 STORAGE_ACCOUNT_NAME="${STORAGE_ACCOUNT_NAME:-azuritelocal}"
+mkdir -p "$CA_DIR"
 openssl req \
     -x509 -noenc -text \
     -newkey rsa:4096 \