diff --git a/CHANGELOG-3.0.md b/CHANGELOG-3.0.md
index 40a1950ed1c78..3aab0be90af7e 100644
--- a/CHANGELOG-3.0.md
+++ b/CHANGELOG-3.0.md
@@ -57,7 +57,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix compression support for h2c protocol ([#4944](https://github.com/opensearch-project/OpenSearch/pull/4944))
 - Don't over-allocate in HeapBufferedAsyncEntityConsumer in order to consume the response ([#9993](https://github.com/opensearch-project/OpenSearch/pull/9993))
 - Fix swapped field formats in nodes API where `total_indexing_buffer_in_bytes` and `total_indexing_buffer` values were reversed ([#17070](https://github.com/opensearch-project/OpenSearch/pull/17070))
-
+- Add HTTP/2 protocol support to HttpRequest.HttpVersion ([#17248](https://github.com/opensearch-project/OpenSearch/pull/17248))
 
 ### Security
 
diff --git a/modules/transport-netty4/src/main/java/org/opensearch/http/netty4/Netty4HttpRequest.java b/modules/transport-netty4/src/main/java/org/opensearch/http/netty4/Netty4HttpRequest.java
index 3c96affb7adf7..9c21d55aaf867 100644
--- a/modules/transport-netty4/src/main/java/org/opensearch/http/netty4/Netty4HttpRequest.java
+++ b/modules/transport-netty4/src/main/java/org/opensearch/http/netty4/Netty4HttpRequest.java
@@ -217,6 +217,8 @@ public HttpVersion protocolVersion() {
             return HttpRequest.HttpVersion.HTTP_1_0;
         } else if (request.protocolVersion().equals(io.netty.handler.codec.http.HttpVersion.HTTP_1_1)) {
             return HttpRequest.HttpVersion.HTTP_1_1;
+        } else if (request.protocolVersion().equals("HTTP/2.0")) {
+            return HttpRequest.HttpVersion.HTTP_2_0;
         } else {
             throw new IllegalArgumentException("Unexpected http protocol version: " + request.protocolVersion());
         }
diff --git a/plugins/transport-reactor-netty4/src/main/java/org/opensearch/http/reactor/netty4/ReactorNetty4HttpRequest.java b/plugins/transport-reactor-netty4/src/main/java/org/opensearch/http/reactor/netty4/ReactorNetty4HttpRequest.java
index 491c7aa885103..c6b90ba578447 100644
--- a/plugins/transport-reactor-netty4/src/main/java/org/opensearch/http/reactor/netty4/ReactorNetty4HttpRequest.java
+++ b/plugins/transport-reactor-netty4/src/main/java/org/opensearch/http/reactor/netty4/ReactorNetty4HttpRequest.java
@@ -156,6 +156,8 @@ public HttpVersion protocolVersion() {
             return HttpRequest.HttpVersion.HTTP_1_0;
         } else if (protocol.equals(io.netty.handler.codec.http.HttpVersion.HTTP_1_1.toString())) {
             return HttpRequest.HttpVersion.HTTP_1_1;
+        } else if (protocol.equals("HTTP/2.0")) {
+            return HttpRequest.HttpVersion.HTTP_2_0;
         } else {
             throw new IllegalArgumentException("Unexpected http protocol version: " + protocol);
         }
diff --git a/server/src/main/java/org/opensearch/http/HttpRequest.java b/server/src/main/java/org/opensearch/http/HttpRequest.java
index 3dc10777b657a..56e6276811377 100644
--- a/server/src/main/java/org/opensearch/http/HttpRequest.java
+++ b/server/src/main/java/org/opensearch/http/HttpRequest.java
@@ -59,7 +59,8 @@ public interface HttpRequest {
     @PublicApi(since = "1.0.0")
     enum HttpVersion {
         HTTP_1_0,
-        HTTP_1_1
+        HTTP_1_1,
+        HTTP_2_0
     }
 
     /**