diff --git a/README.md b/README.md
index 5a97616..3dc7f7e 100644
--- a/README.md
+++ b/README.md
@@ -114,6 +114,9 @@ jobs:
 
           # If the coverage percentage is not green and above or equal to this value, the badge will be orange. Otherwise it will be red.
           badge-threshold-orange: 70
+
+          # Override the default branch name.
+          default-branch: next
 ```
 
 ### Pinning
diff --git a/action.yml b/action.yml
index b620c73..cfdb2d2 100644
--- a/action.yml
+++ b/action.yml
@@ -35,6 +35,9 @@ inputs:
     description: If the coverage percentage is not green and above or equal to this value, the badge will be orange. Otherwise it will be red.
     default: "70"
     required: false
+  default-branch:
+    description: Override the default branch name.
+    required: false
 runs:
   using: node16
   main: dist/index.js
diff --git a/dist/index.js b/dist/index.js
index 9dc5514..25a9e5a 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -13845,7 +13845,7 @@ function isBranch() {
   return process.env.GITHUB_REF.startsWith("refs/heads/");
 }
 
-async function isMainBranch(octokit, owner, repo) {
+async function isDefaultBranch(octokit, owner, repo) {
   let response = await octokit.rest.repos.get({
     owner,
     repo,
@@ -13853,7 +13853,7 @@ async function isMainBranch(octokit, owner, repo) {
   return response.data.default_branch === process.env.GITHUB_REF_NAME;
 }
 
-module.exports = { isBranch, isMainBranch };
+module.exports = { isBranch, isDefaultBranch };
 
 
 /***/ }),
@@ -14278,7 +14278,7 @@ const core = __nccwpck_require__(2186);
 const github = __nccwpck_require__(5438);
 
 const { gitClone, gitUpdate } = __nccwpck_require__(109);
-const { isBranch, isMainBranch } = __nccwpck_require__(6381);
+const { isBranch, isDefaultBranch } = __nccwpck_require__(6381);
 const { getShieldURL, getJSONBadge } = __nccwpck_require__(3673);
 const { average } = __nccwpck_require__(8978);
 const { computeDiff } = __nccwpck_require__(1752);
@@ -14296,6 +14296,7 @@ async function run() {
   const baseSummaryFilename = core.getInput("base-summary-filename");
   const coverageFilename = core.getInput("coverage-filename");
   const badgeThresholdOrange = core.getInput("badge-threshold-orange");
+  const defaultBranch = core.getInput("default-branch");
 
   core.info(`Cloning wiki repository...`);
 
@@ -14315,7 +14316,8 @@ async function run() {
 
   if (
     isBranch() &&
-    (await isMainBranch(octokit, context.repo.owner, context.repo.repo))
+    (defaultBranch === process.env.GITHUB_REF_NAME ||
+      (await isDefaultBranch(octokit, context.repo.owner, context.repo.repo)))
   ) {
     core.info("Running on default branch");
     const BadgeEnabled = core.getBooleanInput("badge-enabled");
diff --git a/src/branch.js b/src/branch.js
index 9d44307..5ac79e1 100644
--- a/src/branch.js
+++ b/src/branch.js
@@ -2,7 +2,7 @@ function isBranch() {
   return process.env.GITHUB_REF.startsWith("refs/heads/");
 }
 
-async function isMainBranch(octokit, owner, repo) {
+async function isDefaultBranch(octokit, owner, repo) {
   let response = await octokit.rest.repos.get({
     owner,
     repo,
@@ -10,4 +10,4 @@ async function isMainBranch(octokit, owner, repo) {
   return response.data.default_branch === process.env.GITHUB_REF_NAME;
 }
 
-module.exports = { isBranch, isMainBranch };
+module.exports = { isBranch, isDefaultBranch };
diff --git a/src/index.js b/src/index.js
index 52d5c2d..db699ef 100644
--- a/src/index.js
+++ b/src/index.js
@@ -11,7 +11,7 @@ const core = require("@actions/core");
 const github = require("@actions/github");
 
 const { gitClone, gitUpdate } = require("./git");
-const { isBranch, isMainBranch } = require("./branch");
+const { isBranch, isDefaultBranch } = require("./branch");
 const { getShieldURL, getJSONBadge } = require("./badge");
 const { average } = require("./math");
 const { computeDiff } = require("./diff");
@@ -29,6 +29,7 @@ async function run() {
   const baseSummaryFilename = core.getInput("base-summary-filename");
   const coverageFilename = core.getInput("coverage-filename");
   const badgeThresholdOrange = core.getInput("badge-threshold-orange");
+  const defaultBranch = core.getInput("default-branch");
 
   core.info(`Cloning wiki repository...`);
 
@@ -48,7 +49,8 @@ async function run() {
 
   if (
     isBranch() &&
-    (await isMainBranch(octokit, context.repo.owner, context.repo.repo))
+    (defaultBranch === process.env.GITHUB_REF_NAME ||
+      (await isDefaultBranch(octokit, context.repo.owner, context.repo.repo)))
   ) {
     core.info("Running on default branch");
     const BadgeEnabled = core.getBooleanInput("badge-enabled");