diff --git a/package.json b/package.json
index 6c23b8c..7f2f098 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "gatsby-transformer-sharp": "^2.11.0",
     "invariant": "^2.2.4",
     "katex": "^0.12.0",
-    "lodash": "^4.17.20",
+    "lodash": "^4.17.21",
     "netlify-cms-app": "^2.14.14",
     "node-sass": "^5.0.0",
     "normalize-scss": "^7.0.1",
diff --git a/yarn.lock b/yarn.lock
index c6cc33a..f26d996 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12673,6 +12673,11 @@ lodash@4.17.20, lodash@^4.0.0, lodash@^4.0.1, lodash@^4.1.1, lodash@^4.15.0, lod
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
   integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
 
+lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
 log-symbols@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/log-symbols/-/log-symbols-4.0.0.tgz#69b3cc46d20f448eccdb75ea1fa733d9e821c920"