diff --git a/README.md b/README.md
index d7125915..95ea51df 100644
--- a/README.md
+++ b/README.md
@@ -324,6 +324,20 @@ Allows specifying a custom version in the `version` field.
 
 If there is a use case missing from Builder, feel free to create a feature request.
 
+#### allowDirtyBuild
+
+Allows the branch of the build to be dirty, and still generate the build.
+
+```yaml
+- uses: webbertakken/unity-builder@<version>
+  with:
+    allowDirtyBuild: true
+```
+
+Note that it is generally bad practice to modify your branch
+in a CI Pipeline. However there are exceptions where this might
+be needed. (use with care).
+
 #### customParameters
 
 Custom parameters to configure the build.
diff --git a/src/model/versioning.test.js b/src/model/versioning.test.js
index f850be65..631f563e 100644
--- a/src/model/versioning.test.js
+++ b/src/model/versioning.test.js
@@ -90,6 +90,16 @@ describe('Versioning', () => {
     });
   });
 
+  describe('isDirtyAllowed', () => {
+    it('does not throw', () => {
+      expect(() => Versioning.isDirtyAllowed).not.toThrow();
+    });
+
+    it('returns false by default', () => {
+      expect(Versioning.isDirtyAllowed).toStrictEqual(false);
+    });
+  });
+
   describe('descriptionRegex', () => {
     it('is a valid regex', () => {
       expect(Versioning.descriptionRegex).toBeInstanceOf(RegExp);