diff --git a/README.md b/README.md
index c15e29c..0793e81 100644
--- a/README.md
+++ b/README.md
@@ -162,6 +162,8 @@ gitVersioning.apply {
 
 - `rev` Rev configuration will be used if no ref configuration is matching current git situation.
     - same as `branch(pattern)`/`tag(pattern)` configuration, except `pattern` parameter.
+ 
+- `gitDir` Provide git directory instead of default project directory, useful when applied from git submodule
 
 ### Format Placeholders
 
diff --git a/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginConfig.java b/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginConfig.java
index 0cc6ad7..6408b44 100644
--- a/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginConfig.java
+++ b/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginConfig.java
@@ -120,4 +120,6 @@ public void tag(String pattern, Action<RefPatchDescription> action) {
             this.list.add(ref);
         }
     }
+
+    public String gitDir = null;
 }
diff --git a/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginExtension.java b/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginExtension.java
index 46751ed..2aba0b0 100644
--- a/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginExtension.java
+++ b/src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPluginExtension.java
@@ -95,7 +95,14 @@ private void apply() throws IOException {
             }
         }
 
-        final GitSituation gitSituation = getGitSituation(project.getProjectDir());
+        File gitDir;
+        if (config.gitDir != null) {
+            gitDir = new File(config.gitDir);
+            project.getLogger().lifecycle("git directory: " + gitDir);
+        } else {
+            gitDir = project.getProjectDir();
+        }
+        final GitSituation gitSituation = getGitSituation(gitDir);
         if (gitSituation == null) {
             project.getLogger().warn("skip - project is not part of a git repository");
             return;