diff --git a/action.yml b/action.yml
index dae6b09..2f67433 100644
--- a/action.yml
+++ b/action.yml
@@ -117,6 +117,9 @@ runs:
 
         export STACKIT_SERVICE_ACCOUNT_KEY_PATH
 
+        STACKIT_ACCESS_TOKEN="$(stackit auth activate-service-account --only-print-access-token)"
+        export STACKIT_ACCESS_TOKEN
+
         STACKIT_PROJECT_ID="$INPUT_PROJECT_ID"
         export STACKIT_PROJECT_ID