diff --git a/services/github/github-pipenv.service.js b/services/github/github-pipenv.service.js
index 7a5989a7f1b3a806927eb28e9a65e7d79a8da61a..bb8ad5039bbe860244b1dadae91995d4ee087543 100644
--- a/services/github/github-pipenv.service.js
+++ b/services/github/github-pipenv.service.js
@@ -66,9 +66,9 @@ class GithubPipenvLockedPythonVersion extends ConditionalGithubAuthV3Service {
       namedParams: {
         user: 'metabolize',
         repo: 'rq-dashboard-on-heroku',
-        branch: 'master',
+        branch: 'main',
       },
-      staticPreview: this.render({ version: '3.7', branch: 'master' }),
+      staticPreview: this.render({ version: '3.7', branch: 'main' }),
       documentation,
       keywords,
     },
@@ -135,7 +135,7 @@ class GithubPipenvLockedDependencyVersion extends ConditionalGithubAuthV3Service
         repo: 'rq-dashboard-on-heroku',
         kind: 'dev',
         packageName: 'black',
-        branch: 'master',
+        branch: 'main',
       },
       staticPreview: this.render({ dependency: 'black', version: '19.3b0' }),
       documentation,
diff --git a/services/github/github-pipenv.tester.js b/services/github/github-pipenv.tester.js
index 6e5cf360e395d0962df80768db5383d0c8f95ce7..236c311b962cb8fc766b89cebd741d4793098bd0 100644
--- a/services/github/github-pipenv.tester.js
+++ b/services/github/github-pipenv.tester.js
@@ -47,7 +47,7 @@ t.create('Locked version of default dependency')
 
 t.create('Locked version of default dependency (branch)')
   .get(
-    '/locked/dependency-version/metabolize/rq-dashboard-on-heroku/rq-dashboard/master.json'
+    '/locked/dependency-version/metabolize/rq-dashboard-on-heroku/rq-dashboard/main.json'
   )
   .expectBadge({
     label: 'rq-dashboard',
@@ -65,7 +65,7 @@ t.create('Locked version of dev dependency')
 
 t.create('Locked version of dev dependency (branch)')
   .get(
-    '/locked/dependency-version/metabolize/rq-dashboard-on-heroku/dev/black/master.json'
+    '/locked/dependency-version/metabolize/rq-dashboard-on-heroku/dev/black/main.json'
   )
   .expectBadge({
     label: 'black',