diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
index 1677edfa..376db65e 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
@@ -367,6 +367,7 @@ public LaunchServer(Path dir, String[] args) throws IOException, InvalidKeySpecE
             config = Launcher.gson.fromJson(reader, Config.class);
         }
         config.verify();
+        Launcher.applyLauncherEnv(config.env);
         for (AuthProvider provider : config.authProvider) {
             provider.init();
         }
@@ -396,13 +397,7 @@ public LaunchServer(Path dir, String[] args) throws IOException, InvalidKeySpecE
         if (config.textureProvider instanceof Reloadable)
             reloadManager.registerReloadable("textureProvider", (Reloadable) config.textureProvider);
 
-        Arrays.stream(config.mirrors).forEach(s -> {
-            try {
-                mirrorManager.addMirror(s);
-            } catch (MalformedURLException e) {
-                e.printStackTrace();
-            }
-        });
+        Arrays.stream(config.mirrors).forEach(mirrorManager::addMirror);
 
         if (config.permissionsHandler instanceof Reconfigurable)
             reconfigurableManager.registerReconfigurable("permissionsHandler", (Reconfigurable) config.permissionsHandler);
@@ -416,13 +411,7 @@ public LaunchServer(Path dir, String[] args) throws IOException, InvalidKeySpecE
         if (config.textureProvider instanceof Reconfigurable)
             reconfigurableManager.registerReconfigurable("textureProvider", (Reconfigurable) config.textureProvider);
 
-        Arrays.stream(config.mirrors).forEach(s -> {
-            try {
-                mirrorManager.addMirror(s);
-            } catch (MalformedURLException e) {
-                e.printStackTrace();
-            }
-        });
+        Arrays.stream(config.mirrors).forEach(mirrorManager::addMirror);
 
         // init modules
         modulesManager.initModules();
diff --git a/ServerWrapper/src/main/java/ru/gravit/launcher/server/ServerWrapper.java b/ServerWrapper/src/main/java/ru/gravit/launcher/server/ServerWrapper.java
index 2baf6264..d46e36cf 100644
--- a/ServerWrapper/src/main/java/ru/gravit/launcher/server/ServerWrapper.java
+++ b/ServerWrapper/src/main/java/ru/gravit/launcher/server/ServerWrapper.java
@@ -108,6 +108,8 @@ public static void main(String... args) throws Throwable {
         }
         LauncherConfig cfg = new LauncherConfig(config.address, config.port, SecurityHelper.toPublicRSAKey(IOHelper.read(publicKeyFile)), new HashMap<>(), config.projectname);
         Launcher.setConfig(cfg);
+        if(config.env != null) Launcher.applyLauncherEnv(config.env);
+        else Launcher.applyLauncherEnv(LauncherConfig.LauncherEnvironment.STD);
         if (config.logFile != null) LogHelper.addOutput(IOHelper.newWriter(Paths.get(config.logFile), true));
         if (config.syncAuth) auth(wrapper);
         else
@@ -176,6 +178,7 @@ private static void generateConfigIfNotExists() throws IOException {
         newConfig.stopOnError = true;
         newConfig.reconnectCount = 10;
         newConfig.reconnectSleep = 1000;
+        newConfig.env = LauncherConfig.LauncherEnvironment.STD;
         //try(Reader reader = IOHelper.newReader(IOHelper.getResourceURL("ru/gravit/launcher/server/ServerWrapper.cfg")))
         //{
         //    newConfig = gson.fromJson(reader,Config.class);
@@ -207,6 +210,7 @@ public static final class Config {
         public String mainclass;
         public String login;
         public String password;
+        public LauncherConfig.LauncherEnvironment env;
     }
 
     public ClientProfile profile;
diff --git a/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java b/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java
index ec40c3a1..fe399fbf 100644
--- a/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java
+++ b/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java
@@ -8,6 +8,7 @@
 import ru.gravit.utils.Version;
 import ru.gravit.utils.helper.IOHelper;
 import ru.gravit.utils.helper.JVMHelper;
+import ru.gravit.utils.helper.LogHelper;
 import ru.gravit.utils.helper.SecurityHelper;
 
 import java.io.IOException;
@@ -130,4 +131,27 @@ public static Version getVersion() {
     public static boolean isUsingAvanguard() {
         return JVMHelper.OS_TYPE == JVMHelper.OS.MUSTDIE && useAvanguard;
     }
+
+    public static void applyLauncherEnv(LauncherConfig.LauncherEnvironment env)
+    {
+        switch (env)
+        {
+            case DEV:
+                LogHelper.setDevEnabled(true);
+                LogHelper.setStacktraceEnabled(true);
+                LogHelper.setDebugEnabled(true);
+                break;
+            case DEBUG:
+                LogHelper.setDebugEnabled(true);
+                LogHelper.setStacktraceEnabled(true);
+                break;
+            case STD:
+                break;
+            case PROD:
+                LogHelper.setStacktraceEnabled(false);
+                LogHelper.setDebugEnabled(false);
+                LogHelper.setDevEnabled(false);
+                break;
+        }
+    }
 }
diff --git a/libLauncher/src/main/java/ru/gravit/launcher/LauncherConfig.java b/libLauncher/src/main/java/ru/gravit/launcher/LauncherConfig.java
index 067df7a0..ea50ef9d 100644
--- a/libLauncher/src/main/java/ru/gravit/launcher/LauncherConfig.java
+++ b/libLauncher/src/main/java/ru/gravit/launcher/LauncherConfig.java
@@ -60,13 +60,7 @@ public LauncherConfig(HInput input) throws IOException, InvalidKeySpecException
         else if (config.env == 2) env = LauncherEnvironment.STD;
         else if (config.env == 3) env = LauncherEnvironment.PROD;
         else env = LauncherEnvironment.STD;
-        if (env == LauncherEnvironment.PROD) {
-            LogHelper.setStacktraceEnabled(false);
-            LogHelper.setDebugEnabled(false);
-        }
-        if (env == LauncherEnvironment.DEV || env == LauncherEnvironment.DEBUG) {
-            LogHelper.setDebugEnabled(true);
-        }
+        Launcher.applyLauncherEnv(env);
         // Read signed runtime
         int count = input.readLength(0);
         Map<String, byte[]> localResources = new HashMap<>(count);
diff --git a/libLauncher/src/main/java/ru/gravit/utils/helper/LogHelper.java b/libLauncher/src/main/java/ru/gravit/utils/helper/LogHelper.java
index 47acb689..4e76fa66 100644
--- a/libLauncher/src/main/java/ru/gravit/utils/helper/LogHelper.java
+++ b/libLauncher/src/main/java/ru/gravit/utils/helper/LogHelper.java
@@ -22,6 +22,8 @@ public final class LogHelper {
     @LauncherAPI
     public static final String DEBUG_PROPERTY = "launcher.debug";
     @LauncherAPI
+    public static final String DEV_PROPERTY = "launcher.dev";
+    @LauncherAPI
     public static final String STACKTRACE_PROPERTY = "launcher.stacktrace";
     @LauncherAPI
     public static final String NO_JANSI_PROPERTY = "launcher.noJAnsi";
@@ -32,6 +34,7 @@ public final class LogHelper {
     private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy.MM.dd HH:mm:ss", Locale.US);
     private static final AtomicBoolean DEBUG_ENABLED = new AtomicBoolean(Boolean.getBoolean(DEBUG_PROPERTY));
     private static final AtomicBoolean STACKTRACE_ENABLED = new AtomicBoolean(Boolean.getBoolean(STACKTRACE_PROPERTY));
+    private static final AtomicBoolean DEV_ENABLED = new AtomicBoolean(Boolean.getBoolean(DEV_PROPERTY));
     private static final Set<Output> OUTPUTS = Collections.newSetFromMap(new ConcurrentHashMap<>(2));
     private static final Output STD_OUTPUT;
 
@@ -64,11 +67,23 @@ public static void debug(String message) {
         }
     }
 
+    @LauncherAPI
+    public static void dev(String message) {
+        if (isDevEnabled()) {
+            log(Level.DEV, message, false);
+        }
+    }
+
     @LauncherAPI
     public static void debug(String format, Object... args) {
         debug(String.format(format, args));
     }
 
+    @LauncherAPI
+    public static void dev(String format, Object... args) {
+        debug(String.format(format, args));
+    }
+
     @LauncherAPI
     public static void error(Throwable exc) {
         error(isStacktraceEnabled() ? toString(exc) : exc.toString());
@@ -109,11 +124,21 @@ public static boolean isStacktraceEnabled() {
         return STACKTRACE_ENABLED.get();
     }
 
+    @LauncherAPI
+    public static boolean isDevEnabled() {
+        return DEV_ENABLED.get();
+    }
+
     @LauncherAPI
     public static void setStacktraceEnabled(boolean stacktraceEnabled) {
         STACKTRACE_ENABLED.set(stacktraceEnabled);
     }
 
+    @LauncherAPI
+    public static void setDevEnabled(boolean stacktraceEnabled) {
+        DEV_ENABLED.set(stacktraceEnabled);
+    }
+
     @LauncherAPI
     public static void log(Level level, String message, boolean sub) {
         String dateTime = DATE_TIME_FORMATTER.format(LocalDateTime.now());
@@ -318,7 +343,7 @@ public interface Output {
 
     @LauncherAPI
     public enum Level {
-        DEBUG("DEBUG"), INFO("INFO"), WARNING("WARN"), ERROR("ERROR");
+        DEV("DEV"),DEBUG("DEBUG"), INFO("INFO"), WARNING("WARN"), ERROR("ERROR");
         public final String name;
 
         Level(String name) {