diff --git a/rest-api-spec/api/get.json b/rest-api-spec/api/get.json
index bea982f3c83..248c3a6d7d2 100644
--- a/rest-api-spec/api/get.json
+++ b/rest-api-spec/api/get.json
@@ -58,6 +58,15 @@
         "_source_include": {
           "type" : "list",
           "description" : "A list of fields to extract and return from the _source field"
+        },
+        "version" : {
+          "type" : "number",
+          "description" : "Explicit version number for concurrency control"
+        },
+        "version_type": {
+          "type" : "enum",
+          "options" : ["internal","external"],
+          "description" : "Specific version type"
         }
       }
     },
diff --git a/rest-api-spec/api/get_source.json b/rest-api-spec/api/get_source.json
index 09560e78fac..8a9622fb490 100644
--- a/rest-api-spec/api/get_source.json
+++ b/rest-api-spec/api/get_source.json
@@ -50,6 +50,14 @@
         "routing": {
           "type" : "string",
           "description" : "Specific routing value"
+        "version" : {
+          "type" : "number",
+          "description" : "Explicit version number for concurrency control"
+        },
+        "version_type": {
+          "type" : "enum",
+          "options" : ["internal","external"],
+          "description" : "Specific version type"
         }
       }
     },