diff --git a/charts/workflows-cluster/values.yaml b/charts/workflows-cluster/values.yaml
index b6805b30a..401c213bf 100644
--- a/charts/workflows-cluster/values.yaml
+++ b/charts/workflows-cluster/values.yaml
@@ -286,7 +286,7 @@ authenticationConfiguration:
           (
             claims.?client_id.hasValue()
             &&
-            ['k6Operator'].exists(allowed, allowed == claims.client_id)
+            ['k6Operator', 'i15-1udc'].exists(allowed, allowed == claims.client_id)
           )
         message: "Invalid access token (service account not on allowed-list). See: https://diamondlightsource.github.io/workflows/docs/how-tos/authentication/"
       - expression: >
@@ -295,7 +295,7 @@ authenticationConfiguration:
           (
             claims.?client_id.hasValue()
             &&
-            ['k6Operator'].exists(allowed, allowed == claims.client_id)
+            ['k6Operator', 'i15-1udc'].exists(allowed, allowed == claims.client_id)
           )
         message: "Invalid access token (missing posix-uid). See: https://diamondlightsource.github.io/workflows/docs/how-tos/authentication/"
     userValidationRules: