diff --git a/layers/boundary/boundary.sql b/layers/boundary/boundary.sql
index 55047ecd..f3c1f627 100644
--- a/layers/boundary/boundary.sql
+++ b/layers/boundary/boundary.sql
@@ -16,7 +16,6 @@ CREATE OR REPLACE VIEW boundary_z1 AS (
     UNION ALL
     SELECT geometry, 4 AS admin_level, false AS disputed, false AS maritime
     FROM ne_50m_admin_1_states_provinces_lines
-    WHERE scalerank <= 2
 );
 
 
@@ -43,29 +42,19 @@ CREATE OR REPLACE VIEW boundary_z4 AS (
     UNION ALL
     SELECT geometry, 4 AS admin_level, false AS disputed, false AS maritime
     FROM ne_10m_admin_1_states_provinces_lines
-    WHERE scalerank <= 3 AND min_zoom <= 7
+    WHERE min_zoom <= 5
     UNION ALL
     SELECT geometry, admin_level, disputed, maritime
     FROM osm_border_linestring_gen10
     WHERE maritime=true AND admin_level <= 2
 );
 
--- etldoc: ne_10m_admin_0_boundary_lines_land -> boundary_z5
--- etldoc: ne_10m_admin_1_states_provinces_lines -> boundary_z5
 -- etldoc: osm_border_linestring_gen9 -> boundary_z5
 
 CREATE OR REPLACE VIEW boundary_z5 AS (
-    SELECT geometry, 2 AS admin_level, false AS disputed, false AS maritime
-    FROM ne_10m_admin_0_boundary_lines_land
-    WHERE featurecla <> 'Lease limit'
-    UNION ALL
-    SELECT geometry, 4 AS admin_level, false AS disputed, false AS maritime
-    FROM ne_10m_admin_1_states_provinces_lines
-    WHERE scalerank <= 7 AND min_zoom <= 8
-    UNION ALL
     SELECT geometry, admin_level, disputed, maritime
     FROM osm_border_linestring_gen9
-    WHERE maritime=true AND admin_level <= 2
+    WHERE admin_level <= 4
 );
 
 -- etldoc: osm_border_linestring_gen8 -> boundary_z6
diff --git a/layers/boundary/boundary.yaml b/layers/boundary/boundary.yaml
index cbceaad0..ec57da08 100644
--- a/layers/boundary/boundary.yaml
+++ b/layers/boundary/boundary.yaml
@@ -2,9 +2,9 @@ layer:
   id: "boundary"
   description: |
       Contains administrative boundaries as linestrings.
-      Until z5 [Natural Earth data](http://www.naturalearthdata.com/downloads/) is used after which
+      Until z4 [Natural Earth data](http://www.naturalearthdata.com/downloads/) is used after which
       OSM boundaries ([`boundary=administrative`](http://wiki.openstreetmap.org/wiki/Tag:boundary%3Dadministrative))
-      are present from z6 to z14 (also for maritime boundaries with admin_level <= 2 at z4 and z5).
+      are present from z5 to z14 (also for maritime boundaries with admin_level <= 2 at z4).
       OSM data contains several [`admin_level`](http://wiki.openstreetmap.org/wiki/Tag:boundary%3Dadministrative#admin_level)
       but for most styles it makes sense to just style `admin_level=2` and `admin_level=4`.
   fields:
diff --git a/layers/boundary/etl_diagram.png b/layers/boundary/etl_diagram.png
index 8f77d16a..12e4ceaf 100644
Binary files a/layers/boundary/etl_diagram.png and b/layers/boundary/etl_diagram.png differ