diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 8be0d76..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-sudo: false
-language: node_js
-script: npm run ci
-
-cache:
-  directories:
-  - node_modules
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a916c96..2021bb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v4.1.0 (27/09/2021)
+
+* Now checks for field name format.
+
 ## v4.0.1 (12/02/2021)
 
 * Support more formats for table ID utility.
diff --git a/README.md b/README.md
index 1e68d4d..226e6ce 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # jsonschema-bigquery
 
 [![npm](https://img.shields.io/npm/v/jsonschema-bigquery.svg)](https://www.npmjs.com/package/jsonschema-bigquery)
-[![Build Status](https://travis-ci.com/thedumbterminal/jsonschema-bigquery.svg?branch=master)](https://travis-ci.com/github/thedumbterminal/jsonschema-bigquery)
+[![Node.js CI](https://github.com/thedumbterminal/jsonschema-bigquery/actions/workflows/main.yml/badge.svg)](https://github.com/thedumbterminal/jsonschema-bigquery/actions/workflows/main.yml)
 
 Convert JSON schema to Google BigQuery schema
 
diff --git a/package.json b/package.json
index 9becea4..f78f3ff 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jsonschema-bigquery",
-  "version": "4.0.1",
+  "version": "4.1.0",
   "description": "Convert JSON schema to Google BigQuery schema",
   "main": "src/converter.js",
   "scripts": {
diff --git a/src/converter.js b/src/converter.js
index 0034a01..90ae5c2 100644
--- a/src/converter.js
+++ b/src/converter.js
@@ -14,6 +14,8 @@ const JSON_SCHEMA_TO_BIGQUERY_TYPE_DICT = {
 
 const OFS = ['allOf', 'anyOf', 'oneOf']
 
+const BIGQUERY_FIELD_NAME_REGEXP = /^[a-z_][a-z0-9_]+$/i
+
 converter._merge_property = (merge_type, property_name, destination_value, source_value) => {
   // Merges two properties.
   let destination_list
@@ -112,10 +114,14 @@ converter._merge_dicts = (merge_type, dest_dict, source_dict) => {
 }
 
 converter._scalar = (name, type, mode, description) => {
+	if(!name.match(BIGQUERY_FIELD_NAME_REGEXP)){
+		throw new SchemaError(`Invalid field name: ${name}`)
+	}
+
   const result = {
-    name: name,
-    type: type,
-    mode: mode
+    name,
+    type,
+    mode
   }
 
   if (description) {
@@ -160,16 +166,8 @@ converter._object = (name, node, mode) => {
       return field != null
     })
 
-    result = {
-      name: name,
-      type: 'RECORD',
-      mode: mode,
-      fields: fields
-    }
-
-    if(node.description){
-      result.description = node.description
-    }
+		result = converter._scalar(name, 'RECORD', mode, node.description)
+		result.fields = fields
   }
   catch (e) {
     if(!converter._options.continueOnError){
diff --git a/test/unit/converter.js b/test/unit/converter.js
index 3f901c7..5001a7f 100644
--- a/test/unit/converter.js
+++ b/test/unit/converter.js
@@ -208,4 +208,26 @@ describe('converter unit', () => {
       })
     })
   })
+
+  describe('_scalar()', () => {
+    context('with an invalid field', () => {
+      it('throws an error', () => {
+        assert.throws(() => {
+          converter._scalar('123test', 'STRING', 'NULLABLE')
+        }, /Invalid field name: 123test/)
+      })
+    })
+  })
+
+  describe('_scalar()', () => {
+    context('with a valid field', () => {
+      it('returns a bigquery field object', () => {
+        assert.deepStrictEqual(converter._scalar('test123', 'STRING', 'NULLABLE'), {
+          mode: 'NULLABLE',
+          name: 'test123',
+          type: 'STRING'
+        })
+      })
+    })
+  })
 })