diff --git a/polyjelly/package-lock.json b/polyjelly/package-lock.json
index 9bfdd94..87fc852 100644
--- a/polyjelly/package-lock.json
+++ b/polyjelly/package-lock.json
@@ -405,9 +405,9 @@
 			}
 		},
 		"highlight.js": {
-			"version": "9.18.1",
-			"resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.18.1.tgz",
-			"integrity": "sha512-OrVKYz70LHsnCgmbXctv/bfuvntIKDz177h0Co37DQ5jamGZLVmoCVMtjMtNZY3X9DrCcKfklHPNeA0uPZhSJg=="
+			"version": "10.4.1",
+			"resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-10.4.1.tgz",
+			"integrity": "sha512-yR5lWvNz7c85OhVAEAeFhVCc/GV4C30Fjzc/rCP0aCWzc1UUOPUk55dK/qdwTZHBvMZo+eZ2jpk62ndX/xMFlg=="
 		},
 		"hmac-drbg": {
 			"version": "1.0.1",
@@ -694,6 +694,13 @@
 			"requires": {
 				"highlight.js": "^9.3.0",
 				"prop-types": "^15.6.0"
+			},
+			"dependencies": {
+				"highlight.js": {
+					"version": "9.18.5",
+					"resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.18.5.tgz",
+					"integrity": "sha512-a5bFyofd/BHCX52/8i8uJkjr9DYwXIPnM/plwI6W7ezItLGqzt7X2G2nXuYSfsIJdkwwj/g9DG1LkcGJI/dDoA=="
+				}
 			}
 		},
 		"react-is": {
diff --git a/polyjelly/package.json b/polyjelly/package.json
index e2cd321..528b803 100644
--- a/polyjelly/package.json
+++ b/polyjelly/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "polyjelly",
 	"dependencies": {
-		"highlight.js": "9.18.1",
+		"highlight.js": "10.4.1",
 		"react": "16.13.1",
 		"react-dom": "16.13.1",
 		"react-highlight.js": "1.0.7"