diff --git a/google/cloud/dialogflow/v2beta1/conversation_profile.proto b/google/cloud/dialogflow/v2beta1/conversation_profile.proto
index d64f99e018e1d..9015a17a8bd8a 100644
--- a/google/cloud/dialogflow/v2beta1/conversation_profile.proto
+++ b/google/cloud/dialogflow/v2beta1/conversation_profile.proto
@@ -472,6 +472,16 @@ message HumanAgentAssistantConfig {
     string model = 1 [(google.api.resource_reference) = {
       type: "dialogflow.googleapis.com/ConversationModel"
     }];
+
+    // Version of current baseline model. It will be ignored if
+    // [model][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.ConversationModelConfig.model]
+    // is set. Valid versions are:
+    //   Article Suggestion baseline model:
+    //     - 0.9
+    //     - 1.0 (default)
+    //   Summarization baseline model:
+    //     - 1.0
+    string baseline_model_version = 8;
   }
 
   // Config to process conversation.