diff --git a/tui-editor/package-lock.json b/tui-editor/package-lock.json
index 3cbad15..435ec94 100644
--- a/tui-editor/package-lock.json
+++ b/tui-editor/package-lock.json
@@ -1069,6 +1069,7 @@
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+      "dev": true,
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         "sprintf-js": "~1.0.2"
       }
@@ -5478,9 +5479,9 @@
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-      "resolved": "https://registry.npmjs.org/entities/-/entities-1.1.2.tgz",
-      "integrity": "sha512-f2LZMYl1Fzu7YSBKg+RoROelpOaNrcGmE9AZubeDfrCEia483oW4MI4VyFd5VNHIgQ/7qm1I0wUHK1eJnn2y2w=="
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-2.1.0.tgz",
+      "integrity": "sha512-hCx1oky9PFrJ611mf0ifBLBRW8lUUVRlFolb5gWRfIELabBlbp9xZvrqZLZAs+NxFnbfQoeGd8wDkygjg7U85w=="
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@@ -9842,9 +9843,9 @@
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-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-2.2.0.tgz",
-      "integrity": "sha512-GnAl/knGn+i1U/wjBz3akz2stz+HrHLsxMwHQGofCDfPvlf+gDKN58UtfmUquTY4/MXeE2x7k19KQmeoZi94Iw==",
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-3.0.3.tgz",
+      "integrity": "sha512-ynTsyrFSdE5oZ/O9GEf00kPngmOfVwazR5GKDq6EYfhlpFug3J2zybX56a2PRRpc9P+FuSoGNAwjlbDs9jJBPQ==",
       "requires": {
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@@ -10435,15 +10436,22 @@
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     "markdown-it": {
-      "version": "9.1.0",
-      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-9.1.0.tgz",
-      "integrity": "sha512-xHKG4C8iPriyfu/jc2hsCC045fKrMQ0VexX2F1FGYiRxDxqMB2aAhF8WauJ3fltn2kb90moGBkiiEdooGIg55w==",
+      "version": "12.3.2",
+      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-12.3.2.tgz",
+      "integrity": "sha512-TchMembfxfNVpHkbtriWltGWc+m3xszaRD0CZup7GFFhzIgQqxIfn3eGj1yZpfuflzPvfkt611B2Q/Bsk1YnGg==",
       "requires": {
-        "argparse": "^1.0.7",
-        "entities": "~1.1.1",
-        "linkify-it": "^2.0.0",
+        "argparse": "^2.0.1",
+        "entities": "~2.1.0",
+        "linkify-it": "^3.0.1",
         "mdurl": "^1.0.1",
         "uc.micro": "^1.0.5"
+      },
+      "dependencies": {
+        "argparse": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+          "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q=="
+        }
       }
     },
     "match-url-wildcard": {
@@ -14011,7 +14019,8 @@
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       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw="
+      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+      "dev": true
     },
     "squire-rte": {
       "version": "github:seonim-ryu/Squire#fd40b4e3020845825701e9689f190bab3f4775d4",
diff --git a/tui-editor/package.json b/tui-editor/package.json
index 3c22012..32d1f07 100644
--- a/tui-editor/package.json
+++ b/tui-editor/package.json
@@ -91,7 +91,7 @@
     "codemirror": "^5.48.4",
     "highlight.js": "^9.12.0",
     "jquery": "^3.3.1",
-    "markdown-it": "^9.0.0",
+    "markdown-it": "^12.3.2",
     "plantuml-encoder": "^1.2.5",
     "resize-observer-polyfill": "^1.5.0",
     "squire-rte": "github:seonim-ryu/Squire#fd40b4e3020845825701e9689f190bab3f4775d4",