diff --git a/NOTICE.txt b/NOTICE.txt
index 9dd784d5a09..be83767d4d9 100644
--- a/NOTICE.txt
+++ b/NOTICE.txt
@@ -1,4 +1,8 @@
-Elasticsearch
+OpenSearch
+Copyright 2021 OpenSearch Contributors
+
+This product includes software developed by
+Elasticsearch (http://www.elastic.co).
 Copyright 2009-2018 Elasticsearch
 
 This product includes software developed by The Apache Software
diff --git a/buildSrc/src/integTest/groovy/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPluginFuncTest.groovy b/buildSrc/src/integTest/groovy/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPluginFuncTest.groovy
index 32b13ab9068..84939184240 100644
--- a/buildSrc/src/integTest/groovy/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPluginFuncTest.groovy
+++ b/buildSrc/src/integTest/groovy/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPluginFuncTest.groovy
@@ -98,7 +98,7 @@ Copyright 2009-2018 Acme Coorp"""
         result.task(":darwin-tar:checkNotice").outcome == TaskOutcome.FAILED
         normalizedOutput(result.output).contains("> expected line [2] in " +
                 "[./darwin-tar/build/tar-extracted/elasticsearch-${VersionProperties.getElasticsearch()}/NOTICE.txt] " +
-                "to be [Copyright 2009-2018 Elasticsearch] but was [Copyright 2009-2018 Acme Coorp]")
+                "to be [Copyright 2021 OpenSearch Contributors] but was [Copyright 2009-2018 Acme Coorp]")
     }
 
     void license(File file = file("licenses/APACHE-LICENSE-2.0.txt")) {
diff --git a/buildSrc/src/main/java/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPlugin.java b/buildSrc/src/main/java/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPlugin.java
index 623f3ce541b..35b6bb5e385 100644
--- a/buildSrc/src/main/java/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPlugin.java
+++ b/buildSrc/src/main/java/org/elasticsearch/gradle/internal/InternalDistributionArchiveCheckPlugin.java
@@ -90,7 +90,7 @@ public class InternalDistributionArchiveCheckPlugin implements Plugin<Project> {
             task.doLast(new Action<Task>() {
                 @Override
                 public void execute(Task task) {
-                    final List<String> noticeLines = Arrays.asList("Elasticsearch", "Copyright 2009-2018 Elasticsearch");
+                    final List<String> noticeLines = Arrays.asList("OpenSearch", "Copyright 2021 OpenSearch Contributors");
                     final Path noticePath = checkExtraction.get()
                         .getDestinationDir()
                         .toPath()
diff --git a/distribution/packages/build.gradle b/distribution/packages/build.gradle
index b97e6ffc5f2..1c7cb12c70f 100644
--- a/distribution/packages/build.gradle
+++ b/distribution/packages/build.gradle
@@ -485,7 +485,7 @@ subprojects {
         (project.name.contains('deb') && dpkgExists.call(it)) || (project.name.contains('rpm') && rpmExists.call(it))
       }
       doLast {
-        final List<String> noticeLines = Arrays.asList("Elasticsearch", "Copyright 2009-2018 Elasticsearch")
+        final List<String> noticeLines = Arrays.asList("OpenSearch", "Copyright 2021 OpenSearch Contributors")
         final Path noticePath = packageExtractionDir.toPath().resolve("usr/share/elasticsearch/NOTICE.txt")
         assertLinesInFile(noticePath, noticeLines)
       }