diff --git a/lib/js/src/protocol/_SdlProtocolBase.js b/lib/js/src/protocol/_SdlProtocolBase.js
index 4fbbe6d4..85194bed 100644
--- a/lib/js/src/protocol/_SdlProtocolBase.js
+++ b/lib/js/src/protocol/_SdlProtocolBase.js
@@ -216,27 +216,27 @@ class _SdlProtocolBase {
      */
     _setVersion (version) {
         if (version > 5) {
-            this._protocolVersion = new Version('5.1.0'); // protect for future, proxy only supports v5 or lower
+            this._protocolVersion = new Version(5, 0, 0); // protect for future, proxy only supports v5 or lower
             this.headerSize = this.constructor.V2_HEADER_SIZE;
             this._mtus[_ServiceType.RPC] = this.constructor.V3_V4_MTU_SIZE;
         } else if (version === 5) {
-            this._protocolVersion = new Version('5.0.0');
+            this._protocolVersion = new Version(5, 0, 0);
             this.headerSize = this.constructor.V2_HEADER_SIZE;
             this._mtus[_ServiceType.RPC] = this.constructor.V3_V4_MTU_SIZE;
         } else if (version === 4) {
-            this._protocolVersion = new Version('4.0.0');
+            this._protocolVersion = new Version(4, 0, 0);
             this.headerSize = this.constructor.V2_HEADER_SIZE;
             this._mtus[_ServiceType.RPC] = this.constructor.V3_V4_MTU_SIZE; // versions 4 supports 128k MTU
         } else if (version === 3) {
-            this._protocolVersion = new Version('3.0.0');
+            this._protocolVersion = new Version(3, 0, 0);
             this.headerSize = this.constructor.V2_HEADER_SIZE;
             this._mtus[_ServiceType.RPC] = this.constructor.V3_V4_MTU_SIZE; // versions 3 supports 128k MTU
         } else if (version === 2) {
-            this._protocolVersion = new Version('2.0.0');
+            this._protocolVersion = new Version(2, 0, 0);
             this.headerSize = this.constructor.V2_HEADER_SIZE;
             this._mtus[_ServiceType.RPC] = this.constructor.V1_V2_MTU_SIZE - this.headerSize;
         } else if (version === 1) {
-            this._protocolVersion = new Version('1.0.0');
+            this._protocolVersion = new Version(1, 0, 0);
             this.headerSize = this.constructor.V1_HEADER_SIZE;
             this._mtus[_ServiceType.RPC] = this.constructor.V1_V2_MTU_SIZE - this.headerSize;
         }