diff --git a/.ci/test-matrix.yml b/.ci/test-matrix.yml
index 2f4e5d8fc..8a536a6f2 100644
--- a/.ci/test-matrix.yml
+++ b/.ci/test-matrix.yml
@@ -1,6 +1,6 @@
 ---
 STACK_VERSION:
-  - 8.10-SNAPSHOT
+  - 8.9-SNAPSHOT
 
 PHP_VERSION:
   - 8.2-cli
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e1481091e..4c96f214d 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: [8.10-SNAPSHOT]
+        es-version: [8.9-SNAPSHOT]
 
     steps:
     - name: Checkout
diff --git a/.github/workflows/unified-release.yml b/.github/workflows/unified-release.yml
index 7bce5b3f4..84bba694b 100644
--- a/.github/workflows/unified-release.yml
+++ b/.github/workflows/unified-release.yml
@@ -20,10 +20,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        stack_version: ['8.10.0-SNAPSHOT']
+        stack_version: ['8.9-SNAPSHOT']
 
     steps:
       - name: Checkout
         uses: actions/checkout@v2
       - run: "./.ci/make.sh assemble ${{ matrix.stack_version }}"
-        name: Assemble ${{ matrix.stack_version }}
\ No newline at end of file
+        name: Assemble ${{ matrix.stack_version }}