diff --git a/packages/frontend/package.json b/packages/frontend/package.json
index 275a6ad025..b46663aca1 100644
--- a/packages/frontend/package.json
+++ b/packages/frontend/package.json
@@ -51,6 +51,7 @@
 		"insert-text-at-cursor": "0.3.0",
 		"is-file-animated": "1.0.2",
 		"json5": "2.2.3",
+		"katex": "^0.16.9",
 		"matter-js": "0.19.0",
 		"misskey-js": "workspace:*",
 		"photoswipe": "5.4.3",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ec05ad3485..c4c51bca2a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -756,6 +756,9 @@ importers:
       json5:
         specifier: 2.2.3
         version: 2.2.3
+      katex:
+        specifier: ^0.16.9
+        version: 0.16.9
       matter-js:
         specifier: 0.19.0
         version: 0.19.0
@@ -14554,6 +14557,13 @@ packages:
       safe-buffer: 5.2.1
     dev: false
 
+  /katex@0.16.9:
+    resolution: {integrity: sha512-fsSYjWS0EEOwvy81j3vRA8TEAhQhKiqO+FQaKWp0m39qwOzHVBgAUBIXWj1pB+O2W3fIpNa6Y9KSKCVbfPhyAQ==}
+    hasBin: true
+    dependencies:
+      commander: 9.5.0
+    dev: false
+
   /keyv@4.5.4:
     resolution: {integrity: sha512-oxVHkHR/EJf2CNXnWxRLW6mg7JyCCUcG0DtEGmL2ctUo1PNTin1PUil+r/+4r5MpVgC/fn1kjsx7mjSujKqIpw==}
     dependencies: