diff --git a/package.json b/package.json
index bf5e124..4a65eb2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ticketbridge/hyper-durable",
-  "version": "0.1.16",
+  "version": "0.1.17",
   "description": "Object-like access to Durable Object properties and methods",
   "repository": {
     "type": "git",
diff --git a/src/index.d.ts b/src/index.d.ts
index c21d707..47cf6cf 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -57,9 +57,9 @@ export class HyperNamespaceProxy<DO extends HyperDurable<any, Env>, Env> {
 }
 
 // TODO: Don't rely on undocumented behavior
-export function proxyHyperDurables<Bindings extends Record<K, typeof DO>, Env, K extends string, DO extends HyperDurable<any, Env>>(
+export function proxyHyperDurables<Bindings extends Record<K, DO>, Env, K extends string, DO extends InstanceType<HyperDurable<any, Env>>>(
   env: Env,
   doBindings: Bindings
 ): {
-  [Prop in keyof Bindings]: HyperNamespaceProxy<Bindings[Prop], Env>
+  [Prop in keyof Bindings]: HyperNamespaceProxy<typeof Bindings[Prop], Env>
 }