diff --git a/.buildkite/shared-pipeline-vars b/.buildkite/shared-pipeline-vars
index c5234e0e..a887803d 100644
--- a/.buildkite/shared-pipeline-vars
+++ b/.buildkite/shared-pipeline-vars
@@ -4,7 +4,7 @@
 # to set up some variables that will be interpolated in the `.yml` pipeline before uploading it.
 
 XCODE_VERSION=$(sed -E 's/^~> ?//' .xcode-version)
-CI_TOOLKIT_PLUGIN_VERSION="6.0.0"
+CI_TOOLKIT_PLUGIN_VERSION="6.3.0"
 
 export IMAGE_ID="xcode-$XCODE_VERSION"
 export CI_TOOLKIT_PLUGIN="automattic/a8c-ci-toolkit#$CI_TOOLKIT_PLUGIN_VERSION"