public void setReadBytes(int readBytes) {
		this.readBytes = readBytes;
		try {
			this.requester.close();
		} catch (IOException e) {
			// noOp
		}
		this.requester = new HTTPRequester.Builder()
			.setReadBytes(this.readBytes)
			.setVersionPolicy(this.versionPolicy)
			.build();
	}
Set version policy one of FORCE_HTTP_1, FORCE_HTTP_2 and NEGOTIATE
ngrinder-runtime/src/main/java/org/ngrinder/http/HTTPRequest.java