diff --git a/packages/types/package.json b/packages/types/package.json
index eb067ff..493a086 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": "^4.18.2"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 8dab72b..cec7b7a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -114,7 +114,7 @@ __metadata:
   dependencies:
     "@types/node": "npm:^20.11.27"
     lit: "npm:^3.1.2"
-    type-fest: "npm:^4.12.0"
+    type-fest: "npm:^4.18.2"
   languageName: unknown
   linkType: soft
 
@@ -6892,10 +6892,10 @@ __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:^4.18.2":
+  version: 4.18.2
+  resolution: "type-fest@npm:4.18.2"
+  checksum: 10c0/5e669128bf7cbc9f9cea4e4862c974517a1d9f77652589c2ac0908a8be5d852d4e52593ed14f4d8a44a604fb5e8a8ec1b658e461acd8bb7592f5e5265a04cbab
   languageName: node
   linkType: hard