diff --git a/README.md b/README.md
index a0aa170..196d925 100644
--- a/README.md
+++ b/README.md
@@ -230,7 +230,7 @@ composer.json includes:
         ],
         "readme": {
             "shields": [
-                "[![Build Status](https://travis-ci.org/runcommand/reset-password.svg?branch=master)](https://travis-ci.org/runcommand/reset-password)"
+                "[![Build Status](https://travis-ci.org/runcommand/reset-password.svg?branch=main)](https://travis-ci.org/runcommand/reset-password)"
             ],
             "sections": [
                 "Using",
@@ -238,7 +238,7 @@ composer.json includes:
                 "Support"
             ],
             "support": {
-                "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/master/bin/readme-partials/support-open-source.md"
+                "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/main/bin/readme-partials/support-open-source.md"
             },
             "show_powered_by": false
         }
@@ -257,7 +257,7 @@ For sections, "pre", "body" and "post" are supported. Example:
 ```
 "support": {
   "pre": "highlight.md",
-  "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/master/bin/readme-partials/support-open-source.md",
+  "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/main/bin/readme-partials/support-open-source.md",
   "post": "This is additional text to show after main body content."
 },
 ```
@@ -276,7 +276,7 @@ In this example:
 		Overwrite the readme if it already exists.
 
 	[--branch=<branch>]
-		Name of default branch of the underlying repository. Defaults to master.
+		Name of default branch of the underlying repository. Defaults to main.
 
 
 
diff --git a/features/scaffold-package-readme.feature b/features/scaffold-package-readme.feature
index 4b64bab..635484c 100644
--- a/features/scaffold-package-readme.feature
+++ b/features/scaffold-package-readme.feature
@@ -44,7 +44,7 @@ Feature: Scaffold a README.md file for an existing package
       """
     And the {PACKAGE_PATH}/local/wp-cli/default-readme/README.md file should contain:
       """
-      [![Build Status](https://travis-ci.org/wp-cli/default-readme.svg?branch=master)
+      [![Build Status](https://travis-ci.org/wp-cli/default-readme.svg?branch=main)
       """
     And the {PACKAGE_PATH}/local/wp-cli/default-readme/README.md file should contain:
       """
@@ -52,7 +52,7 @@ Feature: Scaffold a README.md file for an existing package
       """
     And the {PACKAGE_PATH}/local/wp-cli/default-readme/README.md file should contain:
       """
-      wp package install wp-cli/default-readme:dev-master
+      wp package install wp-cli/default-readme:dev-main
       """
     When I run `wp package uninstall wp-cli/default-readme`
     Then STDOUT should contain:
diff --git a/src/ScaffoldPackageCommand.php b/src/ScaffoldPackageCommand.php
index 8f1f2a7..8061ec2 100644
--- a/src/ScaffoldPackageCommand.php
+++ b/src/ScaffoldPackageCommand.php
@@ -188,7 +188,7 @@ public function package( $args, $assoc_args ) {
 	 *         ],
 	 *         "readme": {
 	 *             "shields": [
-	 *                 "[![Build Status](https://travis-ci.org/runcommand/reset-password.svg?branch=master)](https://travis-ci.org/runcommand/reset-password)"
+	 *                 "[![Build Status](https://travis-ci.org/runcommand/reset-password.svg?branch=main)](https://travis-ci.org/runcommand/reset-password)"
 	 *             ],
 	 *             "sections": [
 	 *                 "Using",
@@ -196,7 +196,7 @@ public function package( $args, $assoc_args ) {
 	 *                 "Support"
 	 *             ],
 	 *             "support": {
-	 *                 "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/master/bin/readme-partials/support-open-source.md"
+	 *                 "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/main/bin/readme-partials/support-open-source.md"
 	 *             },
 	 *             "show_powered_by": false
 	 *         }
@@ -215,7 +215,7 @@ public function package( $args, $assoc_args ) {
 	 * ```
 	 * "support": {
 	 *   "pre": "highlight.md",
-	 *   "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/master/bin/readme-partials/support-open-source.md",
+	 *   "body": "https://raw.githubusercontent.com/runcommand/runcommand-theme/main/bin/readme-partials/support-open-source.md",
 	 *   "post": "This is additional text to show after main body content."
 	 * },
 	 * ```
@@ -234,7 +234,7 @@ public function package( $args, $assoc_args ) {
 	 * : Overwrite the readme if it already exists.
 	 *
 	 * [--branch=<branch>]
-	 * : Name of default branch of the underlying repository. Defaults to master.
+	 * : Name of default branch of the underlying repository. Defaults to main.
 	 *
 	 * @when before_wp_load
 	 * @subcommand package-readme
@@ -254,7 +254,7 @@ public function package_readme( $args, $assoc_args ) {
 		}
 
 		$force  = Utils\get_flag_value( $assoc_args, 'force' );
-		$branch = Utils\get_flag_value( $assoc_args, 'branch', 'master' );
+		$branch = Utils\get_flag_value( $assoc_args, 'branch', 'main' );
 
 		$package_root  = dirname( __DIR__ );
 		$template_path = $package_root . '/templates/';
diff --git a/templates/.travis.yml b/templates/.travis.yml
index 45dc083..f89a39a 100644
--- a/templates/.travis.yml
+++ b/templates/.travis.yml
@@ -14,7 +14,7 @@ notifications:
 
 branches:
   only:
-    - master
+    - main
 
 cache:
   directories:
diff --git a/templates/composer.mustache b/templates/composer.mustache
index be307a7..0e61447 100644
--- a/templates/composer.mustache
+++ b/templates/composer.mustache
@@ -21,7 +21,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.x-dev"
+            "dev-main": "2.x-dev"
         },
         "bundled": false,
         "commands": [