diff --git a/nifi/stackable/bin/update_config b/nifi/stackable/bin/update_config
new file mode 100755
index 000000000..5db6dfbf1
--- /dev/null
+++ b/nifi/stackable/bin/update_config
@@ -0,0 +1,15 @@
+#!/bin/sh -e
+# This script updates the nifi.properties file with the sensitive props key taken from an env var.
+
+nifi_props_file=/stackable/nifi/conf/nifi.properties
+
+# 1 - value to search for
+# 2 - value to replace
+# 3 - file to perform replacement inline
+prop_replace () {
+  target_file=${3:-${nifi_props_file}}
+  echo 'replacing target file ' ${target_file}
+  sed -i -e "s|^$1=.*$|$1=$2|"  ${target_file}
+}
+
+prop_replace nifi.sensitive.props.key "$NIFI_SENSITIVE_PROPS_KEY"
\ No newline at end of file