diff --git a/src/main/java/com/skcraft/launcher/InstanceList.java b/src/main/java/com/skcraft/launcher/InstanceList.java
index 2214e87..cc1ad27 100644
--- a/src/main/java/com/skcraft/launcher/InstanceList.java
+++ b/src/main/java/com/skcraft/launcher/InstanceList.java
@@ -32,7 +32,6 @@
 @Log
 public class InstanceList {
 
-    private static int PARSER_VERSION = 1;
     private final Launcher launcher;
     @Getter private final List<Instance> instances = new ArrayList<Instance>();
 
@@ -108,7 +107,7 @@
                         .returnContent()
                         .asJson(PackageList.class);
 
-                if (packages.getMinimumVersion() > PARSER_VERSION) {
+                if (packages.getMinimumVersion() > Launcher.PROTOCOL_VERSION) {
                     throw new LauncherException("Update required", _("errors.updateRequiredError"));
                 }
 
diff --git a/src/main/java/com/skcraft/launcher/Launcher.java b/src/main/java/com/skcraft/launcher/Launcher.java
index 9883555..3a3750e 100644
--- a/src/main/java/com/skcraft/launcher/Launcher.java
+++ b/src/main/java/com/skcraft/launcher/Launcher.java
@@ -44,6 +44,8 @@
 @Log
 public final class Launcher {
 
+    public static final int PROTOCOL_VERSION = 2;
+
     @Getter
     private final ListeningExecutorService executor = MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
     @Getter private final File baseDir;
diff --git a/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java b/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java
index f9f9c7f..ac97176 100644
--- a/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java
+++ b/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java
@@ -133,6 +133,7 @@
         mapper.setSerializationInclusion(JsonInclude.Include.NON_DEFAULT);
 
         Manifest manifest = new Manifest();
+        manifest.setMinimumVersion(Manifest.MIN_PROTOCOL_VERSION);
         PackageBuilder builder = new PackageBuilder(mapper, manifest);
         builder.setPrettyPrint(options.isPrettyPrinting());
 
diff --git a/src/main/java/com/skcraft/launcher/model/modpack/Manifest.java b/src/main/java/com/skcraft/launcher/model/modpack/Manifest.java
index ec42a7b..cac0f7f 100644
--- a/src/main/java/com/skcraft/launcher/model/modpack/Manifest.java
+++ b/src/main/java/com/skcraft/launcher/model/modpack/Manifest.java
@@ -28,6 +28,9 @@
 @EqualsAndHashCode(callSuper = true)
 public class Manifest extends BaseManifest {
 
+    public static final int MIN_PROTOCOL_VERSION = 2;
+
+    private int minimumVersion;
     private URL baseUrl;
     private String librariesLocation;
     private String objectsLocation;
diff --git a/src/main/java/com/skcraft/launcher/update/BaseUpdater.java b/src/main/java/com/skcraft/launcher/update/BaseUpdater.java
index fc6f874..f189932 100644
--- a/src/main/java/com/skcraft/launcher/update/BaseUpdater.java
+++ b/src/main/java/com/skcraft/launcher/update/BaseUpdater.java
@@ -10,6 +10,7 @@
 import com.skcraft.launcher.AssetsRoot;
 import com.skcraft.launcher.Instance;
 import com.skcraft.launcher.Launcher;
+import com.skcraft.launcher.LauncherException;
 import com.skcraft.launcher.dialog.FeatureSelectionDialog;
 import com.skcraft.launcher.dialog.ProgressDialog;
 import com.skcraft.launcher.install.*;
@@ -36,6 +37,7 @@
 
 import static com.skcraft.launcher.LauncherUtils.checkInterrupted;
 import static com.skcraft.launcher.LauncherUtils.concat;
+import static com.skcraft.launcher.util.SharedLocale._;
 
 @Log
 public abstract class BaseUpdater {
@@ -77,6 +79,10 @@
                 .saveContent(instance.getManifestPath())
                 .asJson(Manifest.class);
 
+        if (manifest.getMinimumVersion() > Launcher.PROTOCOL_VERSION) {
+            throw new LauncherException("Update required", _("errors.updateRequiredError"));
+        }
+
         if (manifest.getBaseUrl() == null) {
             manifest.setBaseUrl(instance.getManifestURL());
         }
diff --git a/src/main/resources/com/skcraft/launcher/lang/Launcher.properties b/src/main/resources/com/skcraft/launcher/lang/Launcher.properties
index 8ee0559..5e0d5fe 100644
--- a/src/main/resources/com/skcraft/launcher/lang/Launcher.properties
+++ b/src/main/resources/com/skcraft/launcher/lang/Launcher.properties
@@ -17,7 +17,7 @@
 errors.openDirError=Unable to open ''{0}''. Maybe it doesn''t exist?
 errors.reportErrorPreface=To report this error, please provide\:\n\n
 errors.genericError=An error has occurred.
-errors.updateRequiredError=Please download a new version of the launcher to continue checking for updates. See skcraft.com for more information.
+errors.updateRequiredError=Please download a new version of the launcher to continue updating. See skcraft.com for more information.
 errors.selfUpdateCheckError=Checking for an update to the launcher has failed.
 
 button.cancel=Cancel