diff --git a/src/actions.ts b/src/actions.ts
index ed5a590..c950e39 100644
--- a/src/actions.ts
+++ b/src/actions.ts
@@ -36,7 +36,7 @@ export async function boot(
 
   await refresh({
     dispatch,
-    branch: loaded?.remote?.branch || 'master',
+    branch: loaded?.remote?.branch || 'main',
     host: loaded?.remote?.host || defaultHost,
     store: loaded,
     handler,
diff --git a/src/models/Store/state.ts b/src/models/Store/state.ts
index 68d8001..fe7b3e4 100644
--- a/src/models/Store/state.ts
+++ b/src/models/Store/state.ts
@@ -18,7 +18,7 @@ import {
   TraitId,
 } from '@pi-base/core'
 
-export const MAIN_BRANCH = 'master'
+export const MAIN_BRANCH = 'main'
 
 export type Proof = {
   properties: Id[]
diff --git a/src/paths.ts b/src/paths.ts
index 4e93824..5e2d6e1 100644
--- a/src/paths.ts
+++ b/src/paths.ts
@@ -17,7 +17,7 @@ const dataRepo = `https://github.com/pi-base/data`
 const viewerRepo = `https://github.com/pi-base/viewer`
 
 export function contributeExample() {
-  return `${dataRepo}/new/master`
+  return `${dataRepo}/new/main`
 }
 
 export function resolveId(id: string) {
@@ -40,7 +40,7 @@ export function viewerIssues({ body, title }: { body: string; title: string }) {
 }
 
 export function contributingGuide() {
-  return `${dataRepo}/blob/master/CONTRIBUTING.md`
+  return `${dataRepo}/blob/main/CONTRIBUTING.md`
 }
 
 export default {