diff --git a/Launcher/source/client/ClientLauncher.java b/Launcher/source/client/ClientLauncher.java
index 6b452b1..9f28f5a 100644
--- a/Launcher/source/client/ClientLauncher.java
+++ b/Launcher/source/client/ClientLauncher.java
@@ -123,7 +123,7 @@
         // Add classpath and main class
         Collections.addAll(args, profile.object.getJvmArgs());
         String v = profile.object.getVersion();
-        if (Version.compare(v, "1.13.2") >= 0 && JVMHelper.OS_TYPE == OS.MACOSX)
+        if (Version.compare(v, "1.13") >= 0 && JVMHelper.OS_TYPE == OS.MACOSX)
             Collections.addAll(args, "-XstartOnFirstThread");
         Collections.addAll(args, "-classpath", IOHelper.getCodeSource(ClientLauncher.class).toString(), ClientLauncher.class.getName());
         args.add(paramsFile.toString()); // Add params file path to args
@@ -253,11 +253,14 @@
             Collections.addAll(args, "--uuid", toHash(pp.uuid));
             Collections.addAll(args, "--accessToken", params.accessToken);
 
-            // Add 1.7.10+ args (user properties, asset index)
-            if (Version.compare(version, "1.7.10") >= 0)
+            // Add 1.7.3+ args (user properties, asset index)
+            if (Version.compare(version, "1.7.3") >= 0)
             {
                 // Add user properties
-                Collections.addAll(args, "--userType", "mojang");
+                if (Version.compare(version, "1.7.4") >= 0)
+                {
+                    Collections.addAll(args, "--userType", "mojang");
+                }
                 JsonObject properties = Json.object();
                 if (pp.skin != null)
                 {
@@ -285,7 +288,7 @@
         Collections.addAll(args, "--gameDir", params.clientDir.toString());
         Collections.addAll(args, "--assetsDir", params.assetDir.toString());
         Collections.addAll(args, "--resourcePackDir", params.clientDir.resolve(RESOURCEPACKS_DIR).toString());
-        if (Version.compare(version, "1.9.4") >= 0)
+        if (Version.compare(version, "1.9.0") >= 0)
         { // Just to show it in debug screen
             Collections.addAll(args, "--versionType", "KJ-Launcher v" + Launcher.VERSION);
         }
@@ -327,7 +330,7 @@
 
         // Add client args
         Collection<String> args = new LinkedList<>();
-        if (Version.compare(profile.getVersion(), "1.6.4") >= 0)
+        if (Version.compare(profile.getVersion(), "1.6.0") >= 0)
         {
             addClientArgs(args, profile, params);
         }
diff --git a/Launcher/source/client/ClientProfile.java b/Launcher/source/client/ClientProfile.java
index 1045811..e1e78ae 100644
--- a/Launcher/source/client/ClientProfile.java
+++ b/Launcher/source/client/ClientProfile.java
@@ -95,7 +95,7 @@
     @LauncherAPI
     public FileNameMatcher getAssetUpdateMatcher()
     {
-        return Version.compare(getVersion(), "1.7.10") >= 0 ? ASSET_MATCHER : null;
+        return Version.compare(getVersion(), "1.7.3") >= 0 ? ASSET_MATCHER : null;
     }
 
     @LauncherAPI
diff --git a/Launcher/source/client/ServerPinger.java b/Launcher/source/client/ServerPinger.java
index 4a62888..14e2d9b 100644
--- a/Launcher/source/client/ServerPinger.java
+++ b/Launcher/source/client/ServerPinger.java
@@ -100,7 +100,7 @@
             try (HInput input = new HInput(socket.getInputStream());
                  HOutput output = new HOutput(socket.getOutputStream()))
             {
-                return Version.compare(version, "1.7.2") >= 0 ? modernPing(input, output) : legacyPing(input, output, Version.compare(version, "1.6.4") >= 0);
+                return Version.compare(version, "1.7") >= 0 ? modernPing(input, output) : legacyPing(input, output, Version.compare(version, "1.6") >= 0);
             }
         }
     }
diff --git a/buildnumber b/buildnumber
index 03116e4..1796522 100644
--- a/buildnumber
+++ b/buildnumber
@@ -1 +1 @@
-514, 09.02.2021
\ No newline at end of file
+515, 09.02.2021
\ No newline at end of file