diff --git a/package-lock.json b/package-lock.json
index 1058dc2..2abd3d3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.0.15",
       "license": "BSD-3-Clause",
       "dependencies": {
-        "@dylibso/xtp-bindgen": "1.0.0-rc.8",
+        "@dylibso/xtp-bindgen": "1.0.0-rc.11",
         "ejs": "^3.1.10"
       },
       "devDependencies": {
@@ -21,9 +21,9 @@
       }
     },
     "node_modules/@dylibso/xtp-bindgen": {
-      "version": "1.0.0-rc.8",
-      "resolved": "https://registry.npmjs.org/@dylibso/xtp-bindgen/-/xtp-bindgen-1.0.0-rc.8.tgz",
-      "integrity": "sha512-9PVXiNa9xL+LNdn0wTY7cUzYiB44RIO/HNIXBeZZSyaA2Tc0rJl97TPcNPpJvQhNUwQVfjWDxCRXYULpUKf/nw=="
+      "version": "1.0.0-rc.11",
+      "resolved": "https://registry.npmjs.org/@dylibso/xtp-bindgen/-/xtp-bindgen-1.0.0-rc.11.tgz",
+      "integrity": "sha512-zXesPfNHKaEK3IwMKFW5qk4UoJTazxmslpyUYn6n4FffZvY7QPBOSomyNVaNRtTr3ziz5SwF2RAm+Rken21HIg=="
     },
     "node_modules/@esbuild/aix-ppc64": {
       "version": "0.19.12",
diff --git a/package.json b/package.json
index e526a44..a0ae529 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "typescript": "^5.3.2"
   },
   "dependencies": {
-    "@dylibso/xtp-bindgen": "1.0.0-rc.8",
+    "@dylibso/xtp-bindgen": "1.0.0-rc.11",
     "ejs": "^3.1.10"
   }
 }
diff --git a/template/src/pdk.ts.ejs b/template/src/pdk.ts.ejs
index f1f2a17..d527301 100644
--- a/template/src/pdk.ts.ejs
+++ b/template/src/pdk.ts.ejs
@@ -40,8 +40,8 @@ export class <%- schema.name %> {
    * <%- formatCommentBlock(p.description) %>
    */
   <% } -%>
-  <%- (p.nullable || toTypeScriptType(p) === 'any') ? null : '// @ts-expect-error TS2564\n' -%>
-  <%- p.name %><%- p.nullable ? '?' : null %>: <%- toTypeScriptType(p) %>;
+  <%- (!p.required || toTypeScriptType(p) === 'any') ? null : '// @ts-expect-error TS2564\n' -%>
+  <%- p.name %><%- !p.required ? '?' : null %>: <%- toTypeScriptType(p) %>;
   <% }) %>
 
   static fromJson(obj: any): <%- schema.name %> {