diff --git a/chaincode/node/reference/package-lock.json b/chaincode/node/reference/package-lock.json
index c624efa6..29ccdf7e 100644
--- a/chaincode/node/reference/package-lock.json
+++ b/chaincode/node/reference/package-lock.json
@@ -134,9 +134,9 @@
 			"integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU="
 		},
 		"color-string": {
-			"version": "1.5.3",
-			"resolved": "https://registry.npmjs.org/color-string/-/color-string-1.5.3.tgz",
-			"integrity": "sha512-dC2C5qeWoYkxki5UAXapdjqO672AM4vZuPGRQfO8b5HKuKGBbKWpITyDYN7TOFKvRW7kOgAn3746clDBMDJyQw==",
+			"version": "1.9.1",
+			"resolved": "https://registry.npmjs.org/color-string/-/color-string-1.9.1.tgz",
+			"integrity": "sha512-shrVawQFojnZv6xM40anx4CkoDP+fZsw/ZerEMsW/pyzsRbElpsL/DBVW7q3ExxwusdNXI3lXpuhEZkzs8p5Eg==",
 			"requires": {
 				"color-name": "^1.0.0",
 				"simple-swizzle": "^0.2.2"