diff --git a/package.json b/package.json
index 765936ee..c4f2d1df 100644
--- a/package.json
+++ b/package.json
@@ -88,7 +88,7 @@
     "@rails/webpacker": "^3.5.5",
     "babel-plugin-transform-react-jsx": "^6.24.1",
     "babel-preset-preact": "^1.1.0",
-    "chart.js": "^2.8.0",
+    "chart.js": "^2.9.4",
     "codemirror": "^5.44.0",
     "intersection-observer": "^0.5.1",
     "linkstate": "^1.1.1",
diff --git a/yarn.lock b/yarn.lock
index fd028ffe..4ee83417 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2700,10 +2700,10 @@ chardet@^0.7.0:
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
   integrity sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==
 
-chart.js@^2.8.0:
-  version "2.8.0"
-  resolved "https://registry.yarnpkg.com/chart.js/-/chart.js-2.8.0.tgz#b703b10d0f4ec5079eaefdcd6ca32dc8f826e0e9"
-  integrity sha512-Di3wUL4BFvqI5FB5K26aQ+hvWh8wnP9A3DWGvXHVkO13D3DSnaSsdZx29cXlEsYKVkn1E2az+ZYFS4t0zi8x0w==
+chart.js@^2.9.4:
+  version "2.9.4"
+  resolved "https://registry.yarnpkg.com/chart.js/-/chart.js-2.9.4.tgz#0827f9563faffb2dc5c06562f8eb10337d5b9684"
+  integrity sha512-B07aAzxcrikjAPyV+01j7BmOpxtQETxTSlQ26BEYJ+3iUkbNKaOJ/nDbT6JjyqYxseM0ON12COHYdU2cTIjC7A==
   dependencies:
     chartjs-color "^2.1.0"
     moment "^2.10.2"