diff --git a/protocol.txt b/protocol.txt
index 670be76..8ace0af 100644
--- a/protocol.txt
+++ b/protocol.txt
@@ -6,6 +6,7 @@ Parameters as GET:
     * password: User's password in plain text.
     * version: Client's version, for example 3.3.1762.
     * os: Computer's operating system, at the moment only "windows", "mac" and "linux" are supported.
+    * os_version: Full version of os, for example "Windows 8.1".
     * bits: Architecture size, at the moment only "32bit" and "64bit" are supported.
     * cpu_family: CPU's family, on linux it can be found in /proc/cpuinfo via the attribute "cpu family".
     * cpu_model: CPU's model, on linux it can be found in /proc/cpuinfo via the attribute "model".
diff --git a/src/com/sheepit/client/Server.java b/src/com/sheepit/client/Server.java
index d271942..f82be4d 100644
--- a/src/com/sheepit/client/Server.java
+++ b/src/com/sheepit/client/Server.java
@@ -197,6 +197,7 @@ public class Server extends Thread {
 				.add("cpu_model_name", os.getCPU().name())
 				.add("cpu_cores", String.valueOf(user_config.getNbCores() == -1 ? os.getCPU().cores() : user_config.getNbCores()))
 				.add("os", os.name())
+				.add("os_version", os.getVersion())
 				.add("ram", String.valueOf(os.getMemory()))
 				.add("bits", os.getCPU().arch())
 				.add("version", user_config.getJarVersion())
diff --git a/src/com/sheepit/client/os/OS.java b/src/com/sheepit/client/os/OS.java
index 5b9eafc..63f1f12 100644
--- a/src/com/sheepit/client/os/OS.java
+++ b/src/com/sheepit/client/os/OS.java
@@ -29,6 +29,13 @@ public abstract class OS {
 	
 	public abstract String name();
 	
+	/** Get the full version of the os.
+	 * For example windows, should give "windows 8.1"
+	 */
+	public String getVersion() {
+		return System.getProperty("os.name").toLowerCase();
+	}
+	
 	public abstract CPU getCPU();
 	
 	public abstract long getMemory();