diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index d5f0e32..65a1402 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -10,7 +10,7 @@ env:
 # Nodes with values to reuse in the pipeline.
 common_params:
   plugins: &common_plugins
-    - automattic/a8c-ci-toolkit#5.3.1
+    - automattic/a8c-ci-toolkit#6.3.0
 
 # This is the default pipeline – it will build and test the library
 steps: