diff --git a/etc/nshm/wus-ceus-attenuation-boundary-2023.geojson b/etc/nshm/wus-ceus-attenuation-boundary-2023.geojson
new file mode 100644
index 0000000000000000000000000000000000000000..a69f5638ce724f86f93f6c48f068855d871f2c95
--- /dev/null
+++ b/etc/nshm/wus-ceus-attenuation-boundary-2023.geojson
@@ -0,0 +1,57 @@
+{
+  "type": "Feature",
+  "geometry": {
+    "type": "LineString",
+    "coordinates": [
+      [-113.348, 48.997],
+      [-112.200, 47.550],
+      [-110.600, 46.850],
+      [-110.500, 46.450],
+      [-110.350, 45.750],
+      [-110.000, 45.500],
+      [-109.900, 44.900],
+      [-110.050, 44.150],
+      [-110.500, 43.000],
+      [-110.500, 42.180],
+      [-110.750, 41.000],
+      [-110.200, 40.000],
+      [-111.350, 39.550],
+      [-112.250, 38.000],
+      [-112.450, 37.000],
+      [-112.300, 36.200],
+      [-112.300, 35.700],
+      [-112.300, 35.250],
+      [-111.000, 34.500],
+      [-110.000, 34.400],
+      [-109.000, 34.250],
+      [-108.000, 34.600],
+      [-107.450, 35.000],
+      [-107.450, 36.500],
+      [-108.200, 37.000],
+      [-108.250, 38.000],
+      [-108.200, 38.750],
+      [-108.000, 39.100],
+      [-107.500, 39.550],
+      [-107.000, 39.650],
+      [-106.500, 39.800],
+      [-106.000, 39.850],
+      [-105.400, 39.800],
+      [-104.800, 38.450],
+      [-105.100, 37.900],
+      [-104.500, 37.100],
+      [-104.600, 36.950],
+      [-105.120, 36.810],
+      [-105.170, 36.590],
+      [-105.300, 35.950],
+      [-105.250, 34.450],
+      [-105.550, 33.850],
+      [-105.350, 33.250],
+      [-104.500, 31.700],
+      [-102.361, 29.828]
+    ]
+  },
+  "properties": {
+    "stroke": "#FC4445",
+    "title": "WUS-CEUS Attenuation Boundary (2023)"
+  }
+}
diff --git a/gradle.properties b/gradle.properties
index edb602673a3c67cb0160d89d623df32ef1eae234..3f48835359cf223a3a469c892eb0c628d133a517 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -10,7 +10,7 @@ micronautVersion = 3.2.3
 micronautRxVersion = 2.1.1
 nodePluginVersion = 3.0.1
 nodeVersion = 16.3.0
-nshmpLibVersion = 1.1.7
+nshmpLibVersion = 1.1.8
 nshmpWsUtilsVersion = 0.3.11
 openApiVersion = 4.0.0
 shadowVersion = 7.1.2