diff --git a/package-lock.json b/package-lock.json
index 7bc889efc..8cb53fd12 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -64,7 +64,7 @@
         "jquery.fancytree": "2.38.4",
         "jsdom": "26.0.0",
         "jsplumb": "2.15.6",
-        "katex": "0.16.20",
+        "katex": "0.16.21",
         "knockout": "3.5.1",
         "mark.js": "8.11.1",
         "marked": "15.0.6",
@@ -11242,9 +11242,9 @@
       }
     },
     "node_modules/katex": {
-      "version": "0.16.20",
-      "resolved": "https://registry.npmjs.org/katex/-/katex-0.16.20.tgz",
-      "integrity": "sha512-jjuLaMGD/7P8jUTpdKhA9IoqnH+yMFB3sdAFtq5QdAqeP2PjiSbnC3EaguKPNtv6dXXanHxp1ckwvF4a86LBig==",
+      "version": "0.16.21",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.16.21.tgz",
+      "integrity": "sha512-XvqR7FgOHtWupfMiigNzmh+MgUVmDGU2kXZm899ZkPfcuoPuFxyHmXsgATDpFZDAXCI8tvinaVcDo8PIIJSo4A==",
       "funding": [
         "https://opencollective.com/katex",
         "https://github.com/sponsors/katex"
diff --git a/package.json b/package.json
index 9a49a33b6..3b6949bb5 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,7 @@
     "jquery.fancytree": "2.38.4",
     "jsdom": "26.0.0",
     "jsplumb": "2.15.6",
-    "katex": "0.16.20",
+    "katex": "0.16.21",
     "knockout": "3.5.1",
     "mark.js": "8.11.1",
     "marked": "15.0.6",