diff --git a/otc_metadata/data/documents/lts-api-ref.yaml b/otc_metadata/data/documents/lts-api-ref.yaml
index 7ae04a0..f04524c 100644
--- a/otc_metadata/data/documents/lts-api-ref.yaml
+++ b/otc_metadata/data/documents/lts-api-ref.yaml
@@ -1,4 +1,5 @@
 ---
+environment: internal
 hc_location: api/lts
 html_location: docs/lts/api-ref
 link: /log-tank-service/api-ref/
diff --git a/otc_metadata/data/documents/lts-umn.yaml b/otc_metadata/data/documents/lts-umn.yaml
index a31d889..24b7011 100644
--- a/otc_metadata/data/documents/lts-umn.yaml
+++ b/otc_metadata/data/documents/lts-umn.yaml
@@ -1,4 +1,5 @@
 ---
+environment: internal
 hc_location: usermanual/lts
 html_location: docs/lts/umn
 link: /log-tank-service/umn/