diff --git a/package-lock.json b/package-lock.json
index 3b4658f7..08e4bdb7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,13 +1,13 @@
 {
 	"name": "markdown-transform",
-	"version": "0.4.5",
+	"version": "0.4.6",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {
 		"@accordproject/concerto-core": {
-			"version": "0.81.0",
-			"resolved": "https://registry.npmjs.org/@accordproject/concerto-core/-/concerto-core-0.81.0.tgz",
-			"integrity": "sha512-J1VLbu8Ou56PPX6VQ78tda2h58JtdE6sCS5UZZPUutwj64X64K9mKjAHSYV95D2Db7Z5sAyG31BF6Y2kTmwr3w==",
+			"version": "0.81.1",
+			"resolved": "https://registry.npmjs.org/@accordproject/concerto-core/-/concerto-core-0.81.1.tgz",
+			"integrity": "sha512-5+33l5LZGl9oAlgJV43/VS4IULcifWjhvkYjRNGteRQQReB/B44GqqzY7z4df2sUexgmpI/mLriY3H4/q3mhNg==",
 			"requires": {
 				"acorn": "5.1.2",
 				"axios": "0.19.0",
@@ -3154,9 +3154,9 @@
 			},
 			"dependencies": {
 				"is-buffer": {
-					"version": "2.0.3",
-					"resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.3.tgz",
-					"integrity": "sha512-U15Q7MXTuZlrbymiz95PJpZxu8IlipAp4dtS3wOdgPXx3mqBnslrWU14kxfHB+Py/+2PVKSr37dMAgM2A4uArw=="
+					"version": "2.0.4",
+					"resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.4.tgz",
+					"integrity": "sha512-Kq1rokWXOPXWuaMAqZiJW4XxsmD9zGx9q4aePabbn3qCRGedtH7Cm+zV8WETitMfu1wdh+Rvd6w5egwSngUX2A=="
 				}
 			}
 		},
diff --git a/packages/markdown-cicero/package.json b/packages/markdown-cicero/package.json
index 8d78fc3f..e17fcaf7 100644
--- a/packages/markdown-cicero/package.json
+++ b/packages/markdown-cicero/package.json
@@ -78,7 +78,7 @@
     "webpack-cli": "^3.3.5"
   },
   "dependencies": {
-    "@accordproject/concerto-core": "^0.81.0",
+    "@accordproject/concerto-core": "^0.81.1",
     "@accordproject/markdown-common": "0.4.6",
     "commonmark": "^0.29.0",
     "sax": "^1.2.4",
diff --git a/packages/markdown-cli/package.json b/packages/markdown-cli/package.json
index 1f1ce01b..985da0a6 100644
--- a/packages/markdown-cli/package.json
+++ b/packages/markdown-cli/package.json
@@ -52,7 +52,7 @@
     "tsd-jsdoc": "^2.3.0"
   },
   "dependencies": {
-    "@accordproject/concerto-core": "^0.81.0",
+    "@accordproject/concerto-core": "^0.81.1",
     "@accordproject/markdown-common": "0.4.6",
     "@accordproject/markdown-cicero": "0.4.6",
     "@accordproject/markdown-slate": "0.4.6",
diff --git a/packages/markdown-common/package.json b/packages/markdown-common/package.json
index bd038b8a..6e096757 100644
--- a/packages/markdown-common/package.json
+++ b/packages/markdown-common/package.json
@@ -77,7 +77,7 @@
     "webpack-cli": "^3.3.5"
   },
   "dependencies": {
-    "@accordproject/concerto-core": "^0.81.0",
+    "@accordproject/concerto-core": "^0.81.1",
     "commonmark": "^0.29.0",
     "sax": "^1.2.4",
     "winston": "3.2.1",