diff --git a/.ci/test-matrix.yml b/.ci/test-matrix.yml
index 8a536a6f2..879607006 100644
--- a/.ci/test-matrix.yml
+++ b/.ci/test-matrix.yml
@@ -1,6 +1,6 @@
 ---
 STACK_VERSION:
-  - 8.9-SNAPSHOT
+  - 8.8-SNAPSHOT
 
 PHP_VERSION:
   - 8.2-cli
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4c96f214d..657ad7cb5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         php-version: [7.4, 8.0, 8.1, 8.2]
         os: [ubuntu-latest]
-        es-version: [8.9-SNAPSHOT]
+        es-version: [8.8-SNAPSHOT]
 
     steps:
     - name: Checkout
diff --git a/src/Client.php b/src/Client.php
index 87d85aefe..702e6e2d8 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -28,7 +28,7 @@
 final class Client implements ClientInterface
 {
     const CLIENT_NAME = 'es';
-    const VERSION = '8.9.0';
+    const VERSION = '8.8.0';
     const API_COMPATIBILITY_HEADER = '%s/vnd.elasticsearch+%s; compatible-with=8';
     
     use ClientEndpointsTrait;