diff --git a/kolibri/plugins/perseus_viewer/package.json b/kolibri/plugins/perseus_viewer/package.json
index ac5ac0ce21e..0a22e825b3d 100644
--- a/kolibri/plugins/perseus_viewer/package.json
+++ b/kolibri/plugins/perseus_viewer/package.json
@@ -36,7 +36,7 @@
     "fractional": "^1.0.0",
     "intersection-observer": "^0.12.0",
     "jquery": "^2.1.1",
-    "katex": "^0.16.20",
+    "katex": "^0.16.21",
     "lodash.debounce": "^4.0.8",
     "prop-types": "^15.6.1",
     "react": "16.14.0",
diff --git a/yarn.lock b/yarn.lock
index dd964db6ed6..38954f9c368 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7710,10 +7710,10 @@ jszip@*, jszip@^3.1.5, jszip@^3.10.1:
     readable-stream "~2.3.6"
     setimmediate "^1.0.5"
 
-katex@^0.16, katex@^0.16.20:
-  version "0.16.20"
-  resolved "https://registry.yarnpkg.com/katex/-/katex-0.16.20.tgz#75c741ded0f7ee8d896a1d31bac307e61af863c3"
-  integrity sha512-jjuLaMGD/7P8jUTpdKhA9IoqnH+yMFB3sdAFtq5QdAqeP2PjiSbnC3EaguKPNtv6dXXanHxp1ckwvF4a86LBig==
+katex@^0.16, katex@^0.16.21:
+  version "0.16.21"
+  resolved "https://registry.yarnpkg.com/katex/-/katex-0.16.21.tgz#8f63c659e931b210139691f2cc7bb35166b792a3"
+  integrity sha512-XvqR7FgOHtWupfMiigNzmh+MgUVmDGU2kXZm899ZkPfcuoPuFxyHmXsgATDpFZDAXCI8tvinaVcDo8PIIJSo4A==
   dependencies:
     commander "^8.3.0"