diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index 73ba625c6..3f91152fc 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -7,7 +7,7 @@ steps:
     env:
       PHP_VERSION: "{{ matrix.php }}"
       TEST_SUITE: "{{ matrix.suite }}"
-      STACK_VERSION: 9.3.0-SNAPSHOT
+      STACK_VERSION: 9.4.0-SNAPSHOT
       BRANCH_CLIENT_TESTS: 9.2
     matrix:
       setup:
diff --git a/.github/workflows/integration_test.yml b/.github/workflows/integration_test.yml
index 0554bc6f1..20ec75031 100644
--- a/.github/workflows/integration_test.yml
+++ b/.github/workflows/integration_test.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         php-version: [8.1, 8.2, 8.3, 8.4]
         os: [ubuntu-latest]
-        es-version: [9.3.0-SNAPSHOT]
+        es-version: [9.4.0-SNAPSHOT]
 
     steps:
     - name: Checkout
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b6caa17d4..9c8dc0354 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         php-version: [8.1, 8.2, 8.3, 8.4]
         os: [ubuntu-latest]
-        es-version: [9.3.0-SNAPSHOT]
+        es-version: [9.4.0-SNAPSHOT]
 
     steps:
     - name: Checkout
diff --git a/.github/workflows/yaml_test.yml b/.github/workflows/yaml_test.yml
index 0b42f77c3..9f45365fc 100644
--- a/.github/workflows/yaml_test.yml
+++ b/.github/workflows/yaml_test.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         php-version: [8.1, 8.2, 8.3, 8.4]
         os: [ubuntu-latest]
-        es-version: [9.3.0-SNAPSHOT]
+        es-version: [9.4.0-SNAPSHOT]
         test-suite: [stack]
         branch-client-tests: ["main"]