diff --git a/extensions/markdown-language-features/package.json b/extensions/markdown-language-features/package.json
index 12ce3d9c88f040917ec021a7546e11313f5ac3c6..f7115786331eaaafe2ea88fb7eeef10227cebf16 100644
--- a/extensions/markdown-language-features/package.json
+++ b/extensions/markdown-language-features/package.json
@@ -292,8 +292,8 @@
 		"build-preview": "webpack --mode development"
 	},
 	"dependencies": {
-		"highlight.js": "9.5.0",
-		"markdown-it": "^8.4.0",
+		"highlight.js": "9.12.0",
+		"markdown-it": "^8.4.1",
 		"markdown-it-named-headers": "0.0.4",
 		"vscode-extension-telemetry": "0.0.17",
 		"vscode-nls": "^3.2.1"
diff --git a/extensions/markdown-language-features/yarn.lock b/extensions/markdown-language-features/yarn.lock
index a052d3ef67f9374e7e5876de40527b3d0cd3adb6..18ac5da44ed25a7478b7d2b7832885484215f50a 100644
--- a/extensions/markdown-language-features/yarn.lock
+++ b/extensions/markdown-language-features/yarn.lock
@@ -2544,9 +2544,9 @@ he@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
 
-highlight.js@9.5.0:
-  version "9.5.0"
-  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.5.0.tgz#46ae51b9db00f70052bcdf196cd404757b6582ae"
+highlight.js@9.12.0:
+  version "9.12.0"
+  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.12.0.tgz#e6d9dbe57cbefe60751f02af336195870c90c01e"
 
 hmac-drbg@^1.0.0:
   version "1.0.1"
@@ -3369,15 +3369,15 @@ markdown-it-named-headers@0.0.4:
   dependencies:
     string "^3.0.1"
 
-markdown-it@^8.4.0:
-  version "8.4.0"
-  resolved "https://registry.yarnpkg.com/markdown-it/-/markdown-it-8.4.0.tgz#e2400881bf171f7018ed1bd9da441dac8af6306d"
+markdown-it@^8.4.1:
+  version "8.4.1"
+  resolved "https://registry.yarnpkg.com/markdown-it/-/markdown-it-8.4.1.tgz#206fe59b0e4e1b78a7c73250af9b34a4ad0aaf44"
   dependencies:
     argparse "^1.0.7"
     entities "~1.1.1"
     linkify-it "^2.0.0"
     mdurl "^1.0.1"
-    uc.micro "^1.0.3"
+    uc.micro "^1.0.5"
 
 md5.js@^1.3.4:
   version "1.3.4"
@@ -5196,10 +5196,14 @@ typescript@^2.7.2:
   version "2.7.2"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.2.tgz#2d615a1ef4aee4f574425cdff7026edf81919836"
 
-uc.micro@^1.0.1, uc.micro@^1.0.3:
+uc.micro@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.3.tgz#7ed50d5e0f9a9fb0a573379259f2a77458d50192"
 
+uc.micro@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.5.tgz#0c65f15f815aa08b560a61ce8b4db7ffc3f45376"
+
 uglify-es@^3.3.4:
   version "3.3.10"
   resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.3.10.tgz#8b0b7992cebe20edc26de1bf325cef797b8f3fa5"