diff --git a/packages/webpack/README.md b/packages/webpack/README.md
index ef90269d9..de655a5f2 100644
--- a/packages/webpack/README.md
+++ b/packages/webpack/README.md
@@ -39,7 +39,7 @@ These plugin parameters correspond to the Honeybadger [Source Map Upload API](ht
   sourcemap server you would like to upload your sourcemaps to instead
   of honeybadger.</dd>
 
-  <dt><code>revision</code> (optional &mdash; default: "master")</dt>
+  <dt><code>revision</code> (optional &mdash; default: "main")</dt>
   <dd>The deploy revision (i.e. commit hash) that your source map applies to. This could also be a code version. For best results, set it to something unique every time your code changes. <a href="https://docs.honeybadger.io/lib/javascript/guides/using-source-maps.html#versioning-your-project">See the Honeybadger docs for examples.</a></dd>
 
   <dt><code>silent</code> (optional &mdash; default: "null/false")</dt>
@@ -85,7 +85,7 @@ const webpackConfig = {
   plugins: [new HoneybadgerSourceMapPlugin({
     apiKey: 'abc123',
     assetsUrl: ASSETS_URL,
-    revision: 'master',
+    revision: 'main',
     // You can also enable deployment notifications:
     deploy: {
        environment: process.env.NODE_ENV,
@@ -103,7 +103,7 @@ const HoneybadgerSourceMapPlugin = require('@honeybadger-io/webpack')
 
 // Assumes Heroku / 12-factor application style ENV variables
 // named GIT_COMMIT, HONEYBADGER_API_KEY, ASSETS_URL
-const revision = process.env.GIT_COMMIT || 'master'
+const revision = process.env.GIT_COMMIT || 'main'
 
 environment.plugins.append(
   'HoneybadgerSourceMap',
diff --git a/packages/webpack/src/HoneybadgerSourceMapPlugin.js b/packages/webpack/src/HoneybadgerSourceMapPlugin.js
index bec85ad3e..63e1b548a 100644
--- a/packages/webpack/src/HoneybadgerSourceMapPlugin.js
+++ b/packages/webpack/src/HoneybadgerSourceMapPlugin.js
@@ -22,7 +22,7 @@ class HoneybadgerSourceMapPlugin {
     apiKey,
     assetsUrl,
     endpoint = ENDPOINT,
-    revision = 'master',
+    revision = 'main',
     silent = false,
     ignoreErrors = false,
     retries = 3,
diff --git a/packages/webpack/test/HoneybadgerSourceMapPlugin.test.js b/packages/webpack/test/HoneybadgerSourceMapPlugin.test.js
index ef3dcdee5..6459c188b 100644
--- a/packages/webpack/test/HoneybadgerSourceMapPlugin.test.js
+++ b/packages/webpack/test/HoneybadgerSourceMapPlugin.test.js
@@ -52,8 +52,8 @@ describe(PLUGIN_NAME, function () {
       expect(this.plugin).to.include({ silent: false })
     })
 
-    it('should default revision to "master"', function () {
-      expect(this.plugin).to.include({ revision: 'master' })
+    it('should default revision to "main"', function () {
+      expect(this.plugin).to.include({ revision: 'main' })
     })
 
     it('should default retries to 3', function () {