diff --git a/jecs.d.ts b/jecs.d.ts
index 01239fd..d01bcf4 100644
--- a/jecs.d.ts
+++ b/jecs.d.ts
@@ -148,7 +148,7 @@ export class World {
 	 * @param entity The target entity.
 	 * @param component The component (or tag) to add.
 	 */
-	add(entity: Entity, component: Id<undefined>): void;
+	add(entity: Entity, component: Id): void;
 
 	/**
 	 * Assigns a value to a component on the given entity.
diff --git a/package-lock.json b/package-lock.json
index ba8032d..1dc56e1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "@rbxts/jecs",
-	"version": "0.6.0-rc.1",
+	"version": "0.6.1",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "@rbxts/jecs",
-			"version": "0.6.0-rc.1",
+			"version": "0.6.1",
 			"license": "MIT",
 			"devDependencies": {
 				"@rbxts/compiler-types": "^2.3.0-types.1",
diff --git a/package.json b/package.json
index f3cf774..b83e52c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@rbxts/jecs",
-	"version": "0.6.0",
+	"version": "0.6.1",
 	"description": "Stupidly fast Entity Component System",
 	"main": "jecs.luau",
 	"repository": {