diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index f9524b2f65..c6c0704117 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -25,8 +25,8 @@ steps:
             transport: main
     env:
       RUBY_VERSION: '{{ matrix.ruby }}'
-      STACK_VERSION: 9.1.0-SNAPSHOT
-      ES_YAML_TESTS_BRANCH: 9.1
+      STACK_VERSION: 9.1.4-SNAPSHOT
+      ES_YAML_TESTS_BRANCH: '9.1'
       TRANSPORT_VERSION: '{{ matrix.transport }}'
       RUBY_SOURCE: '{{ matrix.ruby_source }}'
       TEST_SUITE: platinum
diff --git a/.github/workflows/9.1.yml b/.github/workflows/9.1.yml
index 4203f29587..3d54b6dd9e 100644
--- a/.github/workflows/9.1.yml
+++ b/.github/workflows/9.1.yml
@@ -26,7 +26,7 @@ jobs:
         sudo sysctl -w vm.max_map_count=262144
     - uses: elastic/elastic-github-actions/elasticsearch@master
       with:
-        stack-version: 9.1.0-SNAPSHOT
+        stack-version: 9.1.4-SNAPSHOT
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
@@ -39,4 +39,4 @@ jobs:
     - name: elasticsearch
       run: cd elasticsearch && bundle exec rake test:all
     - name: elasticsearch-api
-      run: rake es:download_artifacts[9.1.0-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:all
+      run: rake es:download_artifacts[9.1.4-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:all
diff --git a/.github/workflows/otel.yml b/.github/workflows/otel.yml
index b7bca6a485..10dcff88fd 100644
--- a/.github/workflows/otel.yml
+++ b/.github/workflows/otel.yml
@@ -28,7 +28,7 @@ jobs:
           sudo sysctl -w vm.max_map_count=262144
       - uses: elastic/elastic-github-actions/elasticsearch@master
         with:
-          stack-version: 9.1.0-SNAPSHOT
+          stack-version: 9.1.4-SNAPSHOT
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
@@ -41,4 +41,4 @@ jobs:
       - name: elasticsearch
         run: cd elasticsearch && bundle exec rake test:all
       - name: elasticsearch-api
-        run: rake es:download_artifacts[9.1.0-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:all
+        run: rake es:download_artifacts[9.1.4-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:all