diff --git a/package.json b/package.json
index 385910c..1241366 100644
--- a/package.json
+++ b/package.json
@@ -4,11 +4,11 @@
   "description": "npm scripts to generate itk-wasm artifacts.",
   "type": "module",
   "scripts": {
-    "build": "npm run build:emscripten && npm run build:wasi",
-    "build:emscripten": "itk-wasm -i itkwasm/emscripten:20230315-07caf9ca build",
-    "build:emscripten:debug": "itk-wasm -i itkwasm/emscripten:20230315-07caf9ca-debug build -- -DCMAKE_BUILD_TYPE:STRING=Debug",
-    "build:wasi": "itk-wasm -i itkwasm/wasi:20230315-07caf9ca build",
-    "build:wasi:debug": "itk-wasm -i itkwasm/wasi:20230315-07caf9ca-debug build -- -DCMAKE_BUILD_TYPE:STRING=Debug",
+    "build": "npm run build:emscripten && npm run build:wasi && npm run bindgen:typescript",
+    "build:emscripten": "itk-wasm -i itkwasm/emscripten:20230328-71e6501e build",
+    "build:emscripten:debug": "itk-wasm -i itkwasm/emscripten:20230328-71e6501e-debug build -- -DCMAKE_BUILD_TYPE:STRING=Debug",
+    "build:wasi": "itk-wasm -i itkwasm/wasi:20230328-71e6501e build",
+    "build:wasi:debug": "itk-wasm -i itkwasm/wasi:20230328-71e6501e-debug build -- -DCMAKE_BUILD_TYPE:STRING=Debug",
     "bindgen:typescript": "itk-wasm -b emscripten-build bindgen --output-dir wasm/typescript --package-name @itk-wasm/cleaver --package-description \"The Cleaver multimaterial tetrahedral meshing tool.\" --repository 'https://github.com/SCIInstitute/Cleaver2'",
     "test": "npm run test:wasi",
     "test:wasi": "itk-wasm test --test-dir wasm",
@@ -16,6 +16,6 @@
   },
   "license": "Apache-2.0",
   "devDependencies": {
-    "itk-wasm": "^1.0.0-b.87"
+    "itk-wasm": "^1.0.0-b.91"
   }
 }
diff --git a/wasm/ITKCleaverWasm.cxx b/wasm/ITKCleaverWasm.cxx
index 111f383..e826c78 100644
--- a/wasm/ITKCleaverWasm.cxx
+++ b/wasm/ITKCleaverWasm.cxx
@@ -83,7 +83,7 @@ class PipelineFunctor
 
     using InputImageType = itk::wasm::InputImage<ImageType>;
     std::vector<InputImageType> inputImages;
-    pipeline.add_option("-i,--input", inputImages, "Input label image or multiple indicator function images")->type_name("INPUT_IMAGE");
+    auto inputImagesOption = pipeline.add_option("-i,--input", inputImages, "Input label image or multiple indicator function images")->type_name("INPUT_IMAGE");
 
     ITK_WASM_PRE_PARSE(pipeline);
 
@@ -94,6 +94,7 @@ class PipelineFunctor
       loadedInputImages[ii] = inputImages[ii].Get();
     }
 
+    inputImagesOption->required();
     int result = Mesher<ImageType>(pipeline, loadedInputImages);
     return result;
   }
diff --git a/wasm/typescript/dist/pipelines/itk-cleaver.wasm b/wasm/typescript/dist/pipelines/itk-cleaver.wasm
index 666395c..9079da3 100755
Binary files a/wasm/typescript/dist/pipelines/itk-cleaver.wasm and b/wasm/typescript/dist/pipelines/itk-cleaver.wasm differ
diff --git a/wasm/typescript/src/itk-cleaver-node.ts b/wasm/typescript/src/itk-cleaver-node.ts
index 0610442..9be339c 100644
--- a/wasm/typescript/src/itk-cleaver-node.ts
+++ b/wasm/typescript/src/itk-cleaver-node.ts
@@ -35,15 +35,17 @@ async function itkCleaverNode(
   args.push('0')
   // Options
   args.push('--memory-io')
-  if (options.input.length < 1) {
-    throw new Error('"input" option must have a length > 0')
+  if (typeof options.input !== "undefined") {
+    if(options.input.length < 1) {
+      throw new Error('"input" option must have a length > 1')
+    }
+    args.push('--input')
+    options.input.forEach((value) => {
+      const inputCountString = inputs.length.toString()
+      inputs.push({ type: InterfaceTypes.Image, data: value as Image})
+      args.push(inputCountString)
+    })
   }
-  args.push('--input')
-  options.input.forEach((inputImage, index) => {
-    args.push((index+0).toString())
-    inputs.push({ type: InterfaceTypes.Image, data: inputImage as Image})
-
-  })
   if (typeof options.sigma !== "undefined") {
     args.push('--sigma', options.sigma.toString())
   }
diff --git a/wasm/typescript/src/itk-cleaver.ts b/wasm/typescript/src/itk-cleaver.ts
index e44f7fa..51b74d9 100644
--- a/wasm/typescript/src/itk-cleaver.ts
+++ b/wasm/typescript/src/itk-cleaver.ts
@@ -39,15 +39,17 @@ async function itkCleaver(
   args.push('0')
   // Options
   args.push('--memory-io')
-  if (options.input.length < 1) {
-    throw new Error('"input" option must have a length > 0')
+  if (typeof options.input !== "undefined") {
+    if(options.input.length < 1) {
+      throw new Error('"input" option must have a length > 1')
+    }
+    args.push('--input')
+    options.input.forEach((value) => {
+      const inputCountString = inputs.length.toString()
+      inputs.push({ type: InterfaceTypes.Image, data: value as Image})
+      args.push(inputCountString)
+    })
   }
-  args.push('--input')
-  options.input.forEach((inputImage, index) => {
-    args.push((index+0).toString())
-    inputs.push({ type: InterfaceTypes.Image, data: inputImage as Image})
-
-  })
   if (typeof options.sigma !== "undefined") {
     args.push('--sigma', options.sigma.toString())
   }