diff --git a/ansys/api/additive/VERSION b/ansys/api/additive/VERSION
index 1cb900d..85b2c0a 100644
--- a/ansys/api/additive/VERSION
+++ b/ansys/api/additive/VERSION
@@ -1 +1 @@
-1.7.0-dev3
\ No newline at end of file
+1.7.0-dev4
\ No newline at end of file
diff --git a/ansys/api/additive/v0/additive_domain.proto b/ansys/api/additive/v0/additive_domain.proto
index 2cd4194..85e9dd3 100644
--- a/ansys/api/additive/v0/additive_domain.proto
+++ b/ansys/api/additive/v0/additive_domain.proto
@@ -69,6 +69,7 @@ message AdditiveMaterial {
     string name = 34;
     repeated ThermalPropertiesDataPoint thermal_properties_data_points = 35;
     repeated CharacteristicWidthDataPoint characteristic_width_data_points = 36;
+    string description = 37;
 }
 
 message CharacteristicWidthDataPoint {