diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1364d92..cfaa1d0 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -12,7 +12,7 @@ jobs:
     parameters:
       solidus:
         type: string
-        default: master
+        default: main
       db:
         type: string
         default: "postgres"
@@ -32,7 +32,7 @@ workflows:
       - run-specs:
           name: &name "run-specs-solidus-<< matrix.solidus >>-ruby-<< matrix.ruby >>-db-<< matrix.db >>"
           matrix:
-            parameters: { solidus: ["master"], ruby: ["3.2"], db: ["postgres"] }
+            parameters: { solidus: ["main"], ruby: ["3.2"], db: ["postgres"] }
       - run-specs:
           name: *name
           matrix:
@@ -42,19 +42,19 @@ workflows:
           matrix:
             parameters: { solidus: ["older"], ruby: ["3.0"], db: ["sqlite"] }
 
-  "Weekly run specs against master":
+  "Weekly run specs against main":
     triggers:
       - schedule:
           cron: "0 0 * * 4" # every Thursday
           filters:
             branches:
               only:
-                - master
+                - main
     jobs:
       - run-specs:
           name: *name
           matrix:
-            parameters: { solidus: ["master"], ruby: ["3.2"], db: ["postgres"] }
+            parameters: { solidus: ["main"], ruby: ["3.2"], db: ["postgres"] }
       - run-specs:
           name: *name
           matrix:
diff --git a/Gemfile b/Gemfile
index a9ad72d..50019bd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-branch = ENV.fetch('SOLIDUS_BRANCH', 'master')
+branch = ENV.fetch('SOLIDUS_BRANCH', 'main')
 gem 'solidus_core', github: 'solidusio/solidus', branch: branch
 
 case ENV['DB']