diff --git a/cspdk/si220/samples/get_route_sc.py b/cspdk/si220/samples/get_route_sc.py
index 3fce58e..a45a1b5 100644
--- a/cspdk/si220/samples/get_route_sc.py
+++ b/cspdk/si220/samples/get_route_sc.py
@@ -11,8 +11,8 @@
     mmi2.dmove((500, 50))
 
     route = tech.route_single_sc(
+        c,
         mmi1.ports["o3"],
         mmi2.ports["o1"],
     )
-    c.add(route.references)
     c.show()
diff --git a/cspdk/si220/tech.py b/cspdk/si220/tech.py
index 90794fa..b6995c1 100644
--- a/cspdk/si220/tech.py
+++ b/cspdk/si220/tech.py
@@ -384,79 +384,90 @@ def route_bundle(
     )
 
 
+route_single_sc = partial(
+    route_single,
+    straight="straight_sc",
+    bend="bend_euler_sc",
+    taper="taper_sc",
+    cross_section="xs_sc",
+)
+route_single_so = partial(
+    route_single,
+    straight="straight_so",
+    bend="bend_euler_so",
+    taper="taper_so",
+    cross_section="xs_so",
+)
+route_single_rc = partial(
+    route_single,
+    straight="straight_rc",
+    bend="bend_euler_rc",
+    taper="taper_rc",
+    cross_section="xs_rc",
+)
+route_single_ro = partial(
+    route_single,
+    straight="straight_ro",
+    bend="bend_euler_ro",
+    taper="taper_ro",
+    cross_section="xs_ro",
+)
+route_bundle_sc = partial(
+    route_bundle,
+    straight="straight_sc",
+    bend="bend_euler_sc",
+    taper="taper_sc",
+    cross_section="xs_sc",
+)
+route_bundle_so = partial(
+    route_bundle,
+    straight="straight_so",
+    bend="bend_euler_so",
+    taper="taper_so",
+    cross_section="xs_so",
+)
+route_bundle_rc = partial(
+    route_bundle,
+    straight="straight_rc",
+    bend="bend_euler_rc",
+    taper="taper_rc",
+    cross_section="xs_rc",
+)
+route_bundle_ro = partial(
+    route_bundle,
+    straight="straight_ro",
+    bend="bend_euler_ro",
+    taper="taper_ro",
+    cross_section="xs_ro",
+)
+route_bundle_metal = partial(
+    route_bundle,
+    straight="straight_metal",
+    bend="bend_metal",
+    taper=None,
+    cross_section="metal_routing",
+)
+route_bundle_metal_corner = partial(
+    route_bundle,
+    straight="straight_metal",
+    bend="wire_corner",
+    taper=None,
+    cross_section="metal_routing",
+)
+
 routing_strategies = dict(
     route_single=route_single,
-    route_single_sc=partial(
-        route_single,
-        straight="straight_sc",
-        bend="bend_euler_sc",
-        taper="taper_sc",
-        cross_section="xs_sc",
-    ),
-    route_single_so=partial(
-        route_single,
-        straight="straight_so",
-        bend="bend_euler_so",
-        taper="taper_so",
-        cross_section="xs_so",
-    ),
-    route_single_rc=partial(
-        route_single,
-        straight="straight_rc",
-        bend="bend_euler_rc",
-        taper="taper_rc",
-        cross_section="xs_rc",
-    ),
-    route_single_ro=partial(
-        route_single,
-        straight="straight_ro",
-        bend="bend_euler_ro",
-        taper="taper_ro",
-        cross_section="xs_ro",
-    ),
     route_bundle=route_bundle,
-    route_bundle_sc=partial(
-        route_bundle,
-        straight="straight_sc",
-        bend="bend_euler_sc",
-        taper="taper_sc",
-        cross_section="xs_sc",
-    ),
-    route_bundle_so=partial(
-        route_bundle,
-        straight="straight_so",
-        bend="bend_euler_so",
-        taper="taper_so",
-        cross_section="xs_so",
-    ),
-    route_bundle_rc=partial(
-        route_bundle,
-        straight="straight_rc",
-        bend="bend_euler_rc",
-        taper="taper_rc",
-        cross_section="xs_rc",
-    ),
-    route_bundle_ro=partial(
-        route_bundle,
-        straight="straight_ro",
-        bend="bend_euler_ro",
-        taper="taper_ro",
-        cross_section="xs_ro",
-    ),
-    route_bundle_metal=partial(
-        route_bundle,
-        straight="straight_metal",
-        bend="bend_metal",
-        taper=None,
-        cross_section="metal_routing",
-    ),
-    route_bundle_metal_corner=partial(
-        route_bundle,
-        straight="straight_metal",
-        bend="wire_corner",
-        taper=None,
-        cross_section="metal_routing",
-    ),
+    route_single_sc=route_single_sc,
+    route_single_so=route_single_so,
+    route_single_rc=route_single_rc,
+    route_single_ro=route_single_ro,
+    route_bundle_sc=route_bundle_sc,
+    route_bundle_so=route_bundle_so,
+    route_bundle_rc=route_bundle_rc,
+    route_bundle_ro=route_bundle_ro,
+    route_bundle_metal=route_bundle_metal,
+    route_bundle_metal_corner=route_bundle_metal_corner,
 )
 
 if __name__ == "__main__":
diff --git a/cspdk/si500/samples/get_route_rc500.py b/cspdk/si500/samples/get_route_rc500.py
index da02ea7..6639fb3 100644
--- a/cspdk/si500/samples/get_route_rc500.py
+++ b/cspdk/si500/samples/get_route_rc500.py
@@ -11,8 +11,8 @@
     mmi2.dmove((500, 50))
 
     route = tech.route_single_rc(
+        c,
         mmi1.ports["o3"],
         mmi2.ports["o1"],
     )
-    c.add(route.references)
     c.show()
diff --git a/cspdk/sin300/samples/get_route_nc.py b/cspdk/sin300/samples/get_route_nc.py
index 4af634a..83ccf25 100644
--- a/cspdk/sin300/samples/get_route_nc.py
+++ b/cspdk/sin300/samples/get_route_nc.py
@@ -11,8 +11,8 @@
     mmi2.dmove((500, 50))
 
     route = tech.route_single_nc(
+        c,
         mmi1.ports["o3"],
         mmi2.ports["o1"],
     )
-    c.add(route.references)
     c.show()
diff --git a/pyproject.toml b/pyproject.toml
index f59eaf7..5379d37 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ classifiers = [
   "Operating System :: OS Independent"
 ]
 dependencies = [
-  "gdsfactory~=8.8.8",
+  "gdsfactory~=8.8.9",
   "gplugins[sax]>=1,<2"
 ]
 description = "CornerStone PDK"