diff --git a/packages/mobile/package.json b/packages/mobile/package.json
index 5e4322e..66fe7cc 100644
--- a/packages/mobile/package.json
+++ b/packages/mobile/package.json
@@ -12,7 +12,7 @@
     "postinstall": "expo-yarn-workspaces postinstall"
   },
   "dependencies": {
-    "date-fns": "^2.1.0",
+    "date-fns": "^2.21.2",
     "expo": "~40.0.0",
     "expo-status-bar": "~1.0.3",
     "react": "16.13.1",
diff --git a/packages/web/package.json b/packages/web/package.json
index e15f181..2b0412a 100644
--- a/packages/web/package.json
+++ b/packages/web/package.json
@@ -8,7 +8,7 @@
     "@interval-timer/core": "*",
     "@testing-library/react": "^11.2.5",
     "@xstate/react": "^0.8.1",
-    "date-fns": "^2.1.0",
+    "date-fns": "^2.21.2",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "react-helmet": "^6.1.0",
diff --git a/yarn.lock b/yarn.lock
index fedf7fa..5eea51b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5545,10 +5545,10 @@ date-fns@^1.27.2:
   resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-1.30.1.tgz#2e71bf0b119153dbb4cc4e88d9ea5acfb50dc05c"
   integrity sha512-hBSVCvSmWC+QypYObzwGOd9wqdDpOt+0wl0KbU+R+uuZBS1jN8VsD1ss3irQDknRj5NvxiTF6oj/nDRnN/UQNw==
 
-date-fns@^2.1.0:
-  version "2.19.0"
-  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.19.0.tgz#65193348635a28d5d916c43ec7ce6fbd145059e1"
-  integrity sha512-X3bf2iTPgCAQp9wvjOQytnf5vO5rESYRXlPIVcgSbtT5OTScPcsf9eZU+B/YIkKAtYr5WeCii58BgATrNitlWg==
+date-fns@^2.21.2:
+  version "2.21.2"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.21.2.tgz#9db92305cf00626e9122e56c72195b17725594aa"
+  integrity sha512-FMkG7pIPx64mGIpS2LOb3Wp3O606H/hatoiz7G0oiYWai1izdM4tF1dd7QABv2NogkIDI4wxsfLLFQSuVvDHgA==
 
 dayjs@^1.8.15:
   version "1.10.4"