diff --git a/make-cert.sh b/make-cert.sh
index 49e6679..c89855b 100755
--- a/make-cert.sh
+++ b/make-cert.sh
@@ -5,9 +5,9 @@
 # For more sophisticated certificate management, consider using Simple CA project
 # from: https://gitea.koszewscy.waw.pl/slawek/simple-ca.git
 
-CA_DIR="./ca"
-CA_NAME="Azurite Emulator CA"
-STORAGE_ACCOUNT_NAME="azuritelocal"
+CA_DIR="${CA_DIR:-./ca}"
+CA_NAME="${CA_NAME:-Azurite Emulator CA}"
+STORAGE_ACCOUNT_NAME="${STORAGE_ACCOUNT_NAME:-azuritelocal}"
 openssl req \
     -x509 -noenc -text \
     -newkey rsa:4096 \