diff --git a/documentation.swagger.json b/documentation.swagger.json
index bb90fcd..2c1165f 100644
--- a/documentation.swagger.json
+++ b/documentation.swagger.json
@@ -462,6 +462,12 @@
             "name": "TimestampEnd",
             "in": "query"
           },
+          {
+            "type": "integer",
+            "format": "int64",
+            "name": "TransactionType",
+            "in": "query"
+          },
           {
             "type": "string",
             "name": "Pagination.OrderField",
diff --git a/model/transaction.proto b/model/transaction.proto
index c7f83ff..cd1ab05 100644
--- a/model/transaction.proto
+++ b/model/transaction.proto
@@ -111,7 +111,8 @@ message GetTransactionsRequest {
     string AccountAddress = 3;
     int64 TimestampStart = 4 [jstype = JS_STRING];
     int64 TimestampEnd = 5 [jstype = JS_STRING];
-    Pagination Pagination = 6;
+    uint32 TransactionType = 6;
+    Pagination Pagination = 7;
 }
 message GetTransactionsResponse {
     // Number of transactions in total