diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index 729336bac..4b5b91e30 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -5,7 +5,7 @@ steps:
     env:
       PYTHON_VERSION: "{{ matrix.python }}"
       TEST_SUITE: "platinum"
-      STACK_VERSION: "9.1.0-SNAPSHOT"
+      STACK_VERSION: "9.1.8-SNAPSHOT"
       PYTHON_CONNECTION_CLASS: "{{ matrix.connection }}"
       NOX_SESSION: "{{ matrix.nox_session }}"
     matrix: