diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java
index f52362d96c69cfc2d664fab27704222dd8be2b8e..576dc2802472e64d3c41f0e0f9b9636bd71c8c45 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java
@@ -1371,6 +1371,11 @@ public enum Gmm {
             CB_14_BASIN,
             CY_14_BASIN)),
 
+    WUS_23_ACTIVE_CRUST(
+        "2023 Development",
+        List.of(
+            BSSA_14_CYBERSHAKE_ADJ)),
+
     WUS_14_INTERFACE(
         "2014 Subduction Interface (WUS)",
         List.of(