diff --git a/.changeset/shiny-donuts-matter.md b/.changeset/shiny-donuts-matter.md
new file mode 100644
index 0000000000..feb581c6da
--- /dev/null
+++ b/.changeset/shiny-donuts-matter.md
@@ -0,0 +1,5 @@
+---
+"create-mud": patch
+---
+
+Made `worlds.json`'s `address` type more like viem's `Hex` type so it's easy to pass through as an argument.
diff --git a/e2e/packages/contracts/worlds.json.d.ts b/e2e/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/e2e/packages/contracts/worlds.json.d.ts
+++ b/e2e/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;
diff --git a/examples/minimal/packages/contracts/worlds.json.d.ts b/examples/minimal/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/examples/minimal/packages/contracts/worlds.json.d.ts
+++ b/examples/minimal/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;
diff --git a/examples/multiple-accounts/packages/contracts/worlds.json.d.ts b/examples/multiple-accounts/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/examples/multiple-accounts/packages/contracts/worlds.json.d.ts
+++ b/examples/multiple-accounts/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;
diff --git a/templates/phaser/packages/contracts/worlds.json.d.ts b/templates/phaser/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/templates/phaser/packages/contracts/worlds.json.d.ts
+++ b/templates/phaser/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;
diff --git a/templates/react-ecs/packages/contracts/worlds.json.d.ts b/templates/react-ecs/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/templates/react-ecs/packages/contracts/worlds.json.d.ts
+++ b/templates/react-ecs/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;
diff --git a/templates/react/packages/contracts/worlds.json.d.ts b/templates/react/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/templates/react/packages/contracts/worlds.json.d.ts
+++ b/templates/react/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;
diff --git a/templates/threejs/packages/contracts/worlds.json.d.ts b/templates/threejs/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/templates/threejs/packages/contracts/worlds.json.d.ts
+++ b/templates/threejs/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;
diff --git a/templates/vanilla/packages/contracts/worlds.json.d.ts b/templates/vanilla/packages/contracts/worlds.json.d.ts
index 90ffc786f4..494829c2f9 100644
--- a/templates/vanilla/packages/contracts/worlds.json.d.ts
+++ b/templates/vanilla/packages/contracts/worlds.json.d.ts
@@ -1,2 +1,2 @@
-declare const worlds: Partial<Record<string, { address: string; blockNumber?: number }>>;
+declare const worlds: Partial<Record<string, { address: `0x${string}`; blockNumber?: number }>>;
 export default worlds;