diff --git a/packages/types/package.json b/packages/types/package.json
index eb067ff..521836b 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -41,6 +41,6 @@
   "devDependencies": {
     "@types/node": "^20.11.27",
     "lit": "^3.1.2",
-    "type-fest": "^4.12.0"
+    "type-fest": "^4.18.3"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 5b43e7d..3be4ba7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -115,7 +115,7 @@ __metadata:
   dependencies:
     "@types/node": "npm:^20.11.27"
     lit: "npm:^3.1.2"
-    type-fest: "npm:^4.12.0"
+    type-fest: "npm:^4.18.3"
   languageName: unknown
   linkType: soft
 
@@ -6893,10 +6893,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"type-fest@npm:^4.12.0":
-  version: 4.12.0
-  resolution: "type-fest@npm:4.12.0"
-  checksum: 10c0/00a7a178d98974449a48f2f2fab1ee33c5ead38fb85eee284de0217de824416e6cbf6dce5d55e12a5d9ac1b557bff96f83e345a2c5983b56619095aba6743625
+"type-fest@npm:^4.18.3":
+  version: 4.18.3
+  resolution: "type-fest@npm:4.18.3"
+  checksum: 10c0/5d51a679a86548e8c35008f09dc8f9f8fdb0fcc79c30d116c9e6c5459a450db28a7e6e6887e6a8a6a560d2cde3757347a5984c18b871de6e739a63991ce2d8d9
   languageName: node
   linkType: hard