diff --git a/tf-m-build-config.yaml b/tf-m-build-config.yaml
index acfefbf..46f5457 100644
--- a/tf-m-build-config.yaml
+++ b/tf-m-build-config.yaml
@@ -131,6 +131,17 @@
             TAG_NAME                 : Pick up a tagged version
             full commit hash         : Pick up a specific commit
       - string:
+          name: 'TFM_TOOLS_URL'
+          default: 'https://git.trustedfirmware.org/TF-M/tf-m-tools.git'
+      - string:
+          name: 'TFM_TOOLS_REFSPEC'
+          default: ''
+          description: |
+            Specify which tf-m-tools version to use
+            refs/heads/<branch_name> : Pick up latest HEAD on branch
+            TAG_NAME                 : Pick up a tagged version
+            full commit hash         : Pick up a specific commit
+      - string:
           name: 'TFM_EXTRAS_URL'
           default: 'https://git.trustedfirmware.org/TF-M/tf-m-extras.git'
       - string: