diff --git a/README.md b/README.md
index 191101eb..bc9046b3 100644
--- a/README.md
+++ b/README.md
@@ -199,6 +199,7 @@ configuring the following optional input parameters as needed.
 | `module-change-exclude-patterns` | Comma-separated list of file patterns (relative to each module) to exclude from triggering version changes. Lets you release a module but control which files inside it do not force a version bump.<br><sub>[Read more here](#understanding-the-filtering-options)</sub>          | `.gitignore,*.md,*.tftest.hcl,tests/**` |
 | `module-asset-exclude-patterns`  | A comma-separated list of file patterns to exclude when bundling a Terraform module for tag/release. Patterns follow glob syntax (e.g., `tests/\*\*`) and are relative to each Terraform module directory. Files matching these patterns will be excluded from the bundled output. | `.gitignore,*.md,*.tftest.hcl,tests/**` |
 | `use-ssh-source-format`          | If enabled, all links to source code in generated Wiki documentation will use SSH standard format (e.g., `git::ssh://git@github.com/owner/repo.git`) instead of HTTPS format (`git::https://github.com/owner/repo.git`)                                                            | `false`                                 |
+| `target-branch`                  | The target branch to use for wiki operations. This allows supporting repositories that use 'main' instead of 'master' as their default branch.                                                                                                                                     | `master`                                |
 
 ### Understanding the filtering options
 
diff --git a/__mocks__/config.ts b/__mocks__/config.ts
index 26a0a7e9..ae64a486 100644
--- a/__mocks__/config.ts
+++ b/__mocks__/config.ts
@@ -26,6 +26,7 @@ const defaultConfig: Config = {
   moduleAssetExcludePatterns: ['tests/**', 'examples/**'],
   githubToken: 'ghp_test_token_2c6912E7710c838347Ae178B4',
   useSSHSourceFormat: false,
+  targetBranch: 'master',
 };
 
 /**
@@ -46,6 +47,7 @@ const validConfigKeys = [
   'moduleAssetExcludePatterns',
   'githubToken',
   'useSSHSourceFormat',
+  'targetBranch',
 ] as const;
 
 type ValidConfigKey = (typeof validConfigKeys)[number];
diff --git a/__tests__/config.test.ts b/__tests__/config.test.ts
index be14bc22..606fc17d 100644
--- a/__tests__/config.test.ts
+++ b/__tests__/config.test.ts
@@ -155,6 +155,7 @@ describe('config', () => {
       expect(config.moduleAssetExcludePatterns).toEqual(['tests/**', 'examples/**']);
       expect(config.modulePathIgnore).toEqual(['tf-modules/kms/examples/complete']);
       expect(config.useSSHSourceFormat).toBe(false);
+      expect(config.targetBranch).toBe('master');
       expect(startGroup).toHaveBeenCalledWith('Initializing Config');
       expect(startGroup).toHaveBeenCalledTimes(1);
       expect(endGroup).toHaveBeenCalledTimes(1);
@@ -171,6 +172,7 @@ describe('config', () => {
         ['Module Change Exclude Patterns: .gitignore, *.md'],
         ['Module Asset Exclude Patterns: tests/**, examples/**'],
         ['Use SSH Source Format: false'],
+        ['Target Branch: master'],
       ]);
     });
   });
diff --git a/__tests__/helpers/inputs.ts b/__tests__/helpers/inputs.ts
index 5fa41ad0..e46c6b0e 100644
--- a/__tests__/helpers/inputs.ts
+++ b/__tests__/helpers/inputs.ts
@@ -22,6 +22,7 @@ export const inputToConfigKeyMap: Record<string, keyof Config> = {
   'module-change-exclude-patterns': 'moduleChangeExcludePatterns',
   'module-asset-exclude-patterns': 'moduleAssetExcludePatterns',
   'use-ssh-source-format': 'useSSHSourceFormat',
+  'target-branch': 'targetBranch',
 };
 
 // Create reverse mapping from config keys to input names
@@ -49,6 +50,7 @@ export const defaultInputs = {
   'module-asset-exclude-patterns': 'tests/**,examples/**',
   github_token: 'ghp_test_token_2c6912E7710c838347Ae178B4',
   'use-ssh-source-format': 'false',
+  'target-branch': 'master',
 };
 export const requiredInputs = [
   'major-keywords',
@@ -62,6 +64,7 @@ export const requiredInputs = [
   'disable-branding',
   'github_token',
   'use-ssh-source-format',
+  'target-branch',
 ];
 export const optionalInputs = Object.keys(defaultInputs).filter((key) => !requiredInputs.includes(key));
 export const booleanInputs = ['delete-legacy-tags', 'disable-wiki', 'disable-branding', 'use-ssh-source-format'];
@@ -73,7 +76,7 @@ export const arrayInputs = [
   'module-change-exclude-patterns',
   'module-asset-exclude-patterns',
 ];
-export const stringInputs = ['default-first-tag', 'terraform-docs-version', 'github_token'];
+export const stringInputs = ['default-first-tag', 'terraform-docs-version', 'github_token', 'target-branch'];
 export const numberInputs = ['wiki-sidebar-changelog-max'];
 
 /**
diff --git a/action.yml b/action.yml
index 124dd781..34142521 100644
--- a/action.yml
+++ b/action.yml
@@ -102,6 +102,12 @@ inputs:
       If enabled, all links to source code in generated Wiki documentation will use SSH format instead of HTTPS format.
     required: true
     default: "false"
+  target-branch:
+    description: >
+      The target branch to use for wiki operations. This allows supporting repositories that use 'main' 
+      instead of 'master' as their default branch.
+    required: true
+    default: "master"
   github_token:
     description: >
       Required for retrieving pull request metadata, tags, releases, updating PR comments, wiki, and creating 
diff --git a/package-lock.json b/package-lock.json
index 290b2ee1..243d6f93 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,7 +27,7 @@
         "@vercel/ncc": "^0.38.3",
         "@vitest/coverage-v8": "^3.1.3",
         "make-coverage-badge": "^1.2.0",
-        "openai": "*",
+        "openai": "latest",
         "textlint": "^14.8.0",
         "textlint-filter-rule-comments": "^1.2.2",
         "textlint-rule-terminology": "^5.2.12",
diff --git a/src/config.ts b/src/config.ts
index 45390210..d8d40930 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -74,6 +74,7 @@ function initializeConfig(): Config {
       moduleChangeExcludePatterns: getArrayInput('module-change-exclude-patterns', false),
       moduleAssetExcludePatterns: getArrayInput('module-asset-exclude-patterns', false),
       useSSHSourceFormat: getBooleanInput('use-ssh-source-format', { required: true }),
+      targetBranch: getInput('target-branch', { required: true }),
     };
 
     // Validate that *.tf is not in excludePatterns
@@ -103,6 +104,7 @@ function initializeConfig(): Config {
     info(`Module Change Exclude Patterns: ${configInstance.moduleChangeExcludePatterns.join(', ')}`);
     info(`Module Asset Exclude Patterns: ${configInstance.moduleAssetExcludePatterns.join(', ')}`);
     info(`Use SSH Source Format: ${configInstance.useSSHSourceFormat}`);
+    info(`Target Branch: ${configInstance.targetBranch}`);
 
     return configInstance;
   } finally {
diff --git a/src/types/config.types.ts b/src/types/config.types.ts
index dea8abf6..8b60aaa6 100644
--- a/src/types/config.types.ts
+++ b/src/types/config.types.ts
@@ -102,4 +102,10 @@ export interface Config {
    * Paths are relative to the workspace directory.
    */
   modulePathIgnore: string[];
+
+  /**
+   * The target branch to use for wiki operations. This allows supporting repositories that use 'main' 
+   * instead of 'master' as their default branch. Defaults to 'master' for backward compatibility.
+   */
+  targetBranch: string;
 }
diff --git a/src/wiki.ts b/src/wiki.ts
index 89b95c9a..9dc43018 100644
--- a/src/wiki.ts
+++ b/src/wiki.ts
@@ -72,7 +72,7 @@ export function checkoutWiki(): void {
   const isExistingRepo = existsSync(join(wikiDirectory, '.git'));
   if (!isExistingRepo) {
     info('Initializing new repository');
-    execFileSync(gitPath, ['init', '--initial-branch=master', wikiDirectory], execWikiOpts);
+    execFileSync(gitPath, ['init', `--initial-branch=${config.targetBranch}`, wikiDirectory], execWikiOpts);
   }
 
   // Set or update the remote URL
@@ -115,13 +115,13 @@ export function checkoutWiki(): void {
         '--no-recurse-submodules',
         '--depth=1',
         'origin',
-        '+refs/heads/master*:refs/remotes/origin/master*',
-        '+refs/tags/master*:refs/tags/master*',
+        `+refs/heads/${config.targetBranch}*:refs/remotes/origin/${config.targetBranch}*`,
+        `+refs/tags/${config.targetBranch}*:refs/tags/${config.targetBranch}*`,
       ],
       execWikiOpts,
     );
 
-    execFileSync(gitPath, ['checkout', 'master'], execWikiOpts);
+    execFileSync(gitPath, ['checkout', config.targetBranch], execWikiOpts);
 
     info('Successfully checked out wiki repository');
   } finally {