diff --git a/packages/api-explorer/__tests__/Params.test.jsx b/packages/api-explorer/__tests__/Params.test.jsx
index b51991982..1baa50df4 100644
--- a/packages/api-explorer/__tests__/Params.test.jsx
+++ b/packages/api-explorer/__tests__/Params.test.jsx
@@ -103,11 +103,12 @@ test('{ type: string, format: binary } should render as <input type="file">', ()
   expect(params.find('.field-file').length).toBe(1);
 });
 
-function renderParams(schema) {
+function renderParams(schema, customProps) {
   return mount(
     <div>
       <Params
         {...props}
+        {...customProps}
         operation={
           new Operation(oas, '/path', 'post', {
             requestBody: {
@@ -232,3 +233,13 @@ describe('readOnly', () => {
     ).toBe(1);
   });
 });
+
+test('defaults should be applied on first render', done => {
+  const defaultValue = 'this is a default value';
+  function onChange(formData) {
+    expect(formData.body).toEqual({ a: defaultValue });
+    return done();
+  }
+
+  renderParams({ type: 'string', default: defaultValue }, { onChange });
+});
diff --git a/packages/api-explorer/package-lock.json b/packages/api-explorer/package-lock.json
index d5ef94912..e9d442c5a 100644
--- a/packages/api-explorer/package-lock.json
+++ b/packages/api-explorer/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@readme/api-explorer",
-  "version": "2.4.0",
+  "version": "2.6.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -2103,7 +2103,7 @@
     },
     "event-stream": {
       "version": "3.3.4",
-      "resolved": "https://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz",
+      "resolved": "http://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz",
       "integrity": "sha1-SrTJoPWlTbkzi0w02Gv86PSzVXE=",
       "requires": {
         "duplexer": "~0.1.1",
@@ -8229,7 +8229,7 @@
       }
     },
     "react-jsonschema-form": {
-      "version": "github:domharrington/react-jsonschema-form#f056a1ed34d2d0841ae897303e9d29b9e8143687",
+      "version": "github:domharrington/react-jsonschema-form#115e75dbbf9b64a107ffb98ec410a8fd6ce1ced5",
       "from": "github:domharrington/react-jsonschema-form#dist-committed",
       "requires": {
         "ajv": "^5.2.3",
@@ -8251,9 +8251,9 @@
           }
         },
         "core-js": {
-          "version": "2.5.7",
-          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.5.7.tgz",
-          "integrity": "sha512-RszJCAxg/PP6uzXVXL6BsxSXx/B05oJAQ2vkJRjyjrEcNVycaqOmNb5OTxZPE3xa5gwZduqza6L9JOCenh/Ecw=="
+          "version": "2.6.0",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.0.tgz",
+          "integrity": "sha512-kLRC6ncVpuEW/1kwrOXYX6KQASCVtrh1gQr/UiaVgFlf9WE5Vp+lNe5+h3LuMr5PAucWnnEXwH0nQHRH/gpGtw=="
         }
       }
     },