diff --git a/Source/DiscoveryV1/Models/NluEnrichmentConcepts.swift b/Source/DiscoveryV1/Models/NluEnrichmentConcepts.swift
new file mode 100644
index 000000000..07740473a
--- /dev/null
+++ b/Source/DiscoveryV1/Models/NluEnrichmentConcepts.swift
@@ -0,0 +1,49 @@
+/**
+ * Copyright IBM Corporation 2018
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+import Foundation
+
+/**
+ An object specifiying the concepts enrichment and related parameters.
+ */
+public struct NluEnrichmentConcepts: Codable, Equatable {
+
+    /**
+     The maximum number of concepts enrichments to extact from each instance of the specified field.
+     */
+    public var limit: Int?
+
+    // Map each property name to the key that shall be used for encoding/decoding.
+    private enum CodingKeys: String, CodingKey {
+        case limit = "limit"
+    }
+
+    /**
+     Initialize a `NluEnrichmentConcepts` with member variables.
+
+     - parameter limit: The maximum number of concepts enrichments to extact from each instance of the specified
+       field.
+
+     - returns: An initialized `NluEnrichmentConcepts`.
+    */
+    public init(
+        limit: Int? = nil
+    )
+    {
+        self.limit = limit
+    }
+
+}
diff --git a/Source/DiscoveryV1/Models/NluEnrichmentFeatures.swift b/Source/DiscoveryV1/Models/NluEnrichmentFeatures.swift
index de549e2da..76991d9c2 100644
--- a/Source/DiscoveryV1/Models/NluEnrichmentFeatures.swift
+++ b/Source/DiscoveryV1/Models/NluEnrichmentFeatures.swift
@@ -54,6 +54,11 @@ public struct NluEnrichmentFeatures: Codable, Equatable {
      */
     public var relations: NluEnrichmentRelations?
 
+    /**
+     An object specifiying the concepts enrichment and related parameters.
+     */
+    public var concepts: NluEnrichmentConcepts?
+
     // Map each property name to the key that shall be used for encoding/decoding.
     private enum CodingKeys: String, CodingKey {
         case keywords = "keywords"
@@ -63,6 +68,7 @@ public struct NluEnrichmentFeatures: Codable, Equatable {
         case categories = "categories"
         case semanticRoles = "semantic_roles"
         case relations = "relations"
+        case concepts = "concepts"
     }
 
     /**
@@ -76,6 +82,7 @@ public struct NluEnrichmentFeatures: Codable, Equatable {
        field.
      - parameter semanticRoles: An object specifiying the semantic roles enrichment and related parameters.
      - parameter relations: An object specifying the relations enrichment and related parameters.
+     - parameter concepts: An object specifiying the concepts enrichment and related parameters.
 
      - returns: An initialized `NluEnrichmentFeatures`.
     */
@@ -86,7 +93,8 @@ public struct NluEnrichmentFeatures: Codable, Equatable {
         emotion: NluEnrichmentEmotion? = nil,
         categories: NluEnrichmentCategories? = nil,
         semanticRoles: NluEnrichmentSemanticRoles? = nil,
-        relations: NluEnrichmentRelations? = nil
+        relations: NluEnrichmentRelations? = nil,
+        concepts: NluEnrichmentConcepts? = nil
     )
     {
         self.keywords = keywords
@@ -96,6 +104,7 @@ public struct NluEnrichmentFeatures: Codable, Equatable {
         self.categories = categories
         self.semanticRoles = semanticRoles
         self.relations = relations
+        self.concepts = concepts
     }
 
 }
diff --git a/WatsonDeveloperCloud.xcodeproj/project.pbxproj b/WatsonDeveloperCloud.xcodeproj/project.pbxproj
index 100a2e184..05cfceb13 100644
--- a/WatsonDeveloperCloud.xcodeproj/project.pbxproj
+++ b/WatsonDeveloperCloud.xcodeproj/project.pbxproj
@@ -1725,6 +1725,7 @@
 				928204C62124BC200013315B /* LogQueryResponseResult.swift */,
 				928204C02124BC1E0013315B /* LogQueryResponseResultDocuments.swift */,
 				928204C12124BC1E0013315B /* LogQueryResponseResultDocumentsResult.swift */,
+				926FAD6321BB3B2D00033989 /* MemoryUsage.swift */,
 				928204C42124BC1F0013315B /* MetricAggregation.swift */,
 				928204BB2124BC1C0013315B /* MetricAggregationResult.swift */,
 				928204C22124BC1F0013315B /* MetricResponse.swift */,
@@ -1734,6 +1735,7 @@
 				683955002077E612009E1C8A /* Nested.swift */,
 				68AF8EC1206968CC00D552E3 /* NewTrainingQuery.swift */,
 				68AF8EFA206968CC00D552E3 /* NluEnrichmentCategories.swift */,
+				926FAD6121BB3B2C00033989 /* NluEnrichmentConcepts.swift */,
 				68AF8EB7206968CC00D552E3 /* NluEnrichmentEmotion.swift */,
 				68AF8EDE206968CC00D552E3 /* NluEnrichmentEntities.swift */,
 				68AF8EB8206968CC00D552E3 /* NluEnrichmentFeatures.swift */,