diff --git a/website/package.json b/website/package.json
index 3b417a0..7c8e8c7 100644
--- a/website/package.json
+++ b/website/package.json
@@ -21,7 +21,7 @@
     "d3": "^7.8.3",
     "fp-ts": "^2.16.0",
     "immer": "^9.0.21",
-    "io-ts": "^2.2.20",
+    "io-ts": "^2.2.21",
     "jss": "^10.10.0",
     "mapshaper": "^0.6.25",
     "next": "^13.2.4",
diff --git a/website/yarn.lock b/website/yarn.lock
index 05dc5c0..66959e9 100644
--- a/website/yarn.lock
+++ b/website/yarn.lock
@@ -1330,10 +1330,10 @@ inherits@2, inherits@^2.0.3, inherits@~2.0.3:
   resolved "https://registry.yarnpkg.com/internmap/-/internmap-2.0.3.tgz#6685f23755e43c524e251d29cbc97248e3061009"
   integrity sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg==
 
-io-ts@^2.2.20:
-  version "2.2.20"
-  resolved "https://registry.yarnpkg.com/io-ts/-/io-ts-2.2.20.tgz#be42b75f6668a2c44f706f72ee6e4c906777c7f5"
-  integrity sha512-Rq2BsYmtwS5vVttie4rqrOCIfHCS9TgpRLFpKQCM1wZBBRY9nWVGmEvm2FnDbSE2un1UE39DvFpTR5UL47YDcA==
+io-ts@^2.2.21:
+  version "2.2.21"
+  resolved "https://registry.yarnpkg.com/io-ts/-/io-ts-2.2.21.tgz#4ef754176f7082a1099d04c7d5c4ea53267c530a"
+  integrity sha512-zz2Z69v9ZIC3mMLYWIeoUcwWD6f+O7yP92FMVVaXEOSZH1jnVBmET/urd/uoarD1WGBY4rCj8TAyMPzsGNzMFQ==
 
 is-in-browser@^1.0.2, is-in-browser@^1.1.3:
   version "1.1.3"