diff --git a/tools/kafka/secrets/create-certs.sh b/tools/kafka/secrets/create-certs.sh
index 83c29ed23b225..701a528b947f4 100755
--- a/tools/kafka/secrets/create-certs.sh
+++ b/tools/kafka/secrets/create-certs.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-cd `dirname $0`
+cd "$(dirname "$0")"
 
 set -o nounset \
     -o errexit \