diff --git a/generators/tsclient/testdata/todo_client.ts b/generators/tsclient/testdata/todo_client.ts
new file mode 100644
index 0000000..6aa65b8
--- /dev/null
+++ b/generators/tsclient/testdata/todo_client.ts
@@ -0,0 +1,96 @@
+
+let fetch = typeof window !== 'undefined' ? window.fetch : null
+if(!fetch) {
+  fetch = require('node-fetch')
+}
+
+
+/**
+* Call method with params via a POST request.
+*/
+
+async function call(url: string, authToken: string, method: string, params?: any): Promise<string> {
+ const res = await fetch(url + '/' + method, {
+	 method: 'POST',
+	 body: JSON.stringify(params),
+	 headers: {
+		 'Content-Type': 'application/json',
+		 'Authorization': `Bearer ${authToken}`
+	 }
+ })
+
+ // we have an error, try to parse a well-formed json
+ // error response, otherwise default to status code
+ if (res.status >= 300) {
+	 let err
+	 try {
+		 const { type, message } = await res.json()
+		 err = new Error(message)
+		 err.type = type
+	 } catch {
+		 err = new Error(`${res.status} ${res.statusText}`)
+	 }
+	 throw err
+ }
+
+ return res.text()
+}
+
+
+const reISO8601 = /(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))/
+
+/**
+ * Client is the API client.
+ */
+
+export class Client {
+
+  private url: string
+  private authToken: string
+
+  /**
+   * Initialize.
+   */
+
+  constructor(params: { url: string, authToken?: string }) {
+    this.url = params.url
+    this.authToken = params.authToken
+  }
+
+  /**
+   * Decoder is used as the reviver parameter when decoding responses.
+   */
+
+  private decoder(key: any, value: any) {
+    return typeof value == 'string' && reISO8601.test(value)
+      ? new Date(value)
+      : value
+  }
+
+  /**
+   * addItem: Add an item to the list.
+   */
+
+  async addItem(params: AddItemInput) {
+    await call(this.url, this.authToken, 'add_item', params)
+  }
+
+  /**
+   * getItems: Return all items in the list.
+   */
+
+  async getItems(): Promise<GetItemsOutput> {
+    let res = await call(this.url, this.authToken, 'get_items')
+    let out: GetItemsOutput = JSON.parse(res, this.decoder)
+    return out
+  }
+
+  /**
+   * removeItem: removes an item from the to-do list.
+   */
+
+  async removeItem(params: RemoveItemInput) {
+    await call(this.url, this.authToken, 'remove_item', params)
+  }
+
+}
diff --git a/generators/tsclient/tsclient.go b/generators/tsclient/tsclient.go
index 55f91b4..1725de3 100644
--- a/generators/tsclient/tsclient.go
+++ b/generators/tsclient/tsclient.go
@@ -54,6 +54,8 @@ func Generate(w io.Writer, s *schema.Schema, fetchLibrary string) error {
 	out(w, require, fetchLibrary)
 	out(w, "\n%s\n", call)
 	out(w, "\n\n")
+	out(w, `const reISO8601 = /(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))/`)
+	out(w, "\n\n")
 	out(w, "/**\n")
 	out(w, " * Client is the API client.\n")
 	out(w, " */\n")
@@ -72,6 +74,16 @@ func Generate(w io.Writer, s *schema.Schema, fetchLibrary string) error {
 	out(w, "    this.authToken = params.authToken\n")
 	out(w, "  }\n")
 	out(w, "\n")
+	out(w, "  /**\n")
+	out(w, "   * Decoder is used as the reviver parameter when decoding responses.\n")
+	out(w, "   */\n")
+	out(w, "\n")
+	out(w, "  private decoder(key: any, value: any) {\n")
+	out(w, "    return typeof value == 'string' && reISO8601.test(value)\n")
+	out(w, "      ? new Date(value)\n")
+	out(w, "      : value\n")
+	out(w, "  }\n")
+	out(w, "\n")
 
 	// methods
 	for _, m := range s.Methods {
@@ -103,7 +115,7 @@ func Generate(w io.Writer, s *schema.Schema, fetchLibrary string) error {
 			} else {
 				out(w, "await call(this.url, this.authToken, '%s')\n", m.Name)
 			}
-			out(w, "    let out: %sOutput = JSON.parse(res)\n", format.GoName(m.Name))
+			out(w, "    let out: %sOutput = JSON.parse(res, this.decoder)\n", format.GoName(m.Name))
 			out(w, "    return out\n")
 		} else {
 			// call
diff --git a/generators/tsclient/tsclient_test.go b/generators/tsclient/tsclient_test.go
index c8d24f1..d8b24dc 100644
--- a/generators/tsclient/tsclient_test.go
+++ b/generators/tsclient/tsclient_test.go
@@ -1 +1,25 @@
 package tsclient_test
+
+import (
+	"bytes"
+	"io/ioutil"
+	"testing"
+
+	"github.com/apex/rpc/generators/tsclient"
+	"github.com/apex/rpc/schema"
+	"github.com/tj/assert"
+)
+
+func TestGenerate(t *testing.T) {
+	exp, err := ioutil.ReadFile("testdata/todo_client.ts")
+	assert.NoError(t, err, "reading fixture")
+
+	schema, err := schema.Load("../../examples/todo/schema.json")
+	assert.NoError(t, err, "loading schema")
+
+	var act bytes.Buffer
+	err = tsclient.Generate(&act, schema, "node-fetch")
+	assert.NoError(t, err, "generating")
+
+	assert.Equal(t, string(exp), act.String())
+}
diff --git a/go.sum b/go.sum
index 31f2359..cc795db 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,7 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/gofuzz v1.0.0 h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/iancoleman/strcase v0.0.0-20191112232945-16388991a334 h1:VHgatEHNcBFEB7inlalqfNqw65aNkM1lGX2yt3NmbS8=
 github.com/iancoleman/strcase v0.0.0-20191112232945-16388991a334/go.mod h1:SK73tn/9oHe+/Y0h39VT4UCxmurVJkR5NA7kMEAOgSE=
@@ -13,6 +14,7 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 h1:Esafd1046DLD
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=