bump version number
diff --git a/lib/swift/Tests/ThriftTests/ThriftTests.swift b/lib/swift/Tests/ThriftTests/ThriftTests.swift
index 3c6854c..10121e7 100644
--- a/lib/swift/Tests/ThriftTests/ThriftTests.swift
+++ b/lib/swift/Tests/ThriftTests/ThriftTests.swift
@@ -3,7 +3,7 @@
 
 class ThriftTests: XCTestCase {
   func testVersion() {
-    XCTAssertEqual(Thrift().version, "0.20.0")
+    XCTAssertEqual(Thrift().version, "0.21.0")
   }
 
   static var allTests : [(String, (ThriftTests) -> () throws -> Void)] {