diff --git a/.gitignore b/.gitignore
index 94376640..7c8c0f1b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
-.idea
+.idea/*
+!.idea/copyright
 *.iml
 .gradle
 out
diff --git a/.idea/copyright/SPDX_ALv2.xml b/.idea/copyright/SPDX_ALv2.xml
new file mode 100644
index 00000000..a2485bee
--- /dev/null
+++ b/.idea/copyright/SPDX_ALv2.xml
@@ -0,0 +1,6 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="notice" value="SPDX-License-Identifier: Apache-2.0&#10;&#10;The OpenSearch Contributors require contributions made to&#10;this file be licensed under the Apache-2.0 license or a&#10;compatible open source license.&#10;&#10;Modifications Copyright OpenSearch Contributors. See&#10;GitHub history for details." />
+    <option name="myName" value="SPDX-ALv2" />
+  </copyright>
+</component>
\ No newline at end of file
diff --git a/.idea/copyright/profiles_settings.xml b/.idea/copyright/profiles_settings.xml
new file mode 100644
index 00000000..c2b6d3d5
--- /dev/null
+++ b/.idea/copyright/profiles_settings.xml
@@ -0,0 +1,3 @@
+<component name="CopyrightManager">
+  <settings default="SPDX-ALv2" />
+</component>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 3c070aba..d8e96643 100644
--- a/build.gradle
+++ b/build.gradle
@@ -59,8 +59,7 @@ ext {
     noticeFile = rootProject.file('NOTICE')
 }
 
-// TODO: enable
-licenseHeaders.enabled = false
+licenseHeaders.enabled = true
 testingConventions.enabled = false
 forbiddenApis.ignoreFailures = false
 
diff --git a/sample-extension-plugin/build.gradle b/sample-extension-plugin/build.gradle
index 8c0053c4..db62aa9c 100644
--- a/sample-extension-plugin/build.gradle
+++ b/sample-extension-plugin/build.gradle
@@ -51,7 +51,7 @@ dependencies {
     compileOnly project(path: ":${rootProject.name}-spi", configuration: 'shadow')
 }
 
-licenseHeaders.enabled = false
+licenseHeaders.enabled = true
 validateNebulaPom.enabled = false
 testingConventions.enabled = false
 loggerUsageCheck.enabled = false