diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
index e4291d50..213e4241 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
@@ -67,6 +67,36 @@ public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IO
         }
     }
 
+    private final class GuardDirVisitor extends SimpleFileVisitor<Path> {
+        private final ZipOutputStream output;
+        private final Map<String, byte[]> runtime;
+
+        private GuardDirVisitor(ZipOutputStream output, Map<String, byte[]> runtime) {
+            this.output = output;
+            this.runtime = runtime;
+        }
+
+        @Override
+        public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
+            String dirName = IOHelper.toString(guardDir.relativize(dir));
+            output.putNextEntry(newEntry(dirName + '/'));
+            return super.preVisitDirectory(dir, attrs);
+        }
+
+        @Override
+        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+            String fileName = IOHelper.toString(guardDir.relativize(file));
+            runtime.put(fileName, SecurityHelper.digest(DigestAlgorithm.MD5, file));
+
+            // Create zip entry and transfer contents
+            output.putNextEntry(newEntry(fileName));
+            IOHelper.transfer(file, output);
+
+            // Return result
+            return super.visitFile(file, attrs);
+        }
+    }
+
     private static ZipEntry newEntry(String fileName) {
         return newZipEntry(Launcher.RUNTIME_DIR + IOHelper.CROSS_SEPARATOR + fileName);
     }
@@ -224,6 +254,7 @@ private void stdBuild() throws IOException {
                     throw new IOException(String.format("Missing init script file ('%s')", Launcher.INIT_SCRIPT_FILE));
                 // Write launcher runtime dir
                 IOHelper.walk(runtimeDir, new RuntimeDirVisitor(output, runtime), false);
+                IOHelper.walk(guardDir, new GuardDirVisitor(output, runtime), false);
             }
             // Create launcher config file
             byte[] launcherConfigBytes;
@@ -242,13 +273,6 @@ private void stdBuild() throws IOException {
             output.putNextEntry(e);
             jaConfigurator.compile();
             output.write(jaConfigurator.getBytecode());
-            for(String file : guardFileList)
-            {
-                Path path = guardDir.resolve(file);
-                ZipEntry en = newZipEntry(file);
-                output.putNextEntry(en);
-                IOHelper.transfer(path,output);
-            }
             server.buildHookManager.postHook(context);
         } catch (CannotCompileException | NotFoundException e) {
             LogHelper.error(e);
diff --git a/Launcher/src/main/java/ru/gravit/launcher/AvanguardStarter.java b/Launcher/src/main/java/ru/gravit/launcher/AvanguardStarter.java
index 80a16e05..ddab14f1 100644
--- a/Launcher/src/main/java/ru/gravit/launcher/AvanguardStarter.java
+++ b/Launcher/src/main/java/ru/gravit/launcher/AvanguardStarter.java
@@ -96,8 +96,10 @@ public static void start(Path path1) throws IOException {
             Files.createDirectories(path);
         Path avanguard = path.resolve(JVMHelper.JVM_BITS == 64 ? "Avanguard64.dll" : "Avanguard32.dll");
         Path wrapper = path.resolve(JVMHelper.JVM_BITS == 64 ? NAME + "64.exe" : NAME + "32.exe");
-        UnpackHelper.unpack(JVMHelper.JVM_BITS == 64 ? "Avanguard64.dll" : "Avanguard32.dll",avanguard);
-        UnpackHelper.unpack(JVMHelper.JVM_BITS == 64 ? "wrapper64.exe" : "wrapper32.exe",wrapper);
+        String avanguardResource = JVMHelper.JVM_BITS == 64 ? "Avanguard64.dll" : "Avanguard32.dll";
+        String wrapperResource = JVMHelper.JVM_BITS == 64 ? "wrapper64.exe" : "wrapper32.exe";
+        UnpackHelper.unpack(Launcher.getResourceURL(avanguardResource,"guard"),avanguard);
+        UnpackHelper.unpack(Launcher.getResourceURL(wrapperResource,"guard"),wrapper);
         AvanguardStarter.wrapper = wrapper;
         AvanguardStarter.avanguard = avanguard;
         HashedDir guard = new HashedDir(path, null, true, false);
diff --git a/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java b/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java
index 184929b1..bbbed701 100644
--- a/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java
+++ b/libLauncher/src/main/java/ru/gravit/launcher/Launcher.java
@@ -103,6 +103,21 @@ public static URL getResourceURL(String name) throws IOException {
         return url;
     }
 
+    public static URL getResourceURL(String name,String prefix) throws IOException {
+        LauncherConfig config = getConfig();
+        byte[] validDigest = config.runtime.get(name);
+        if (validDigest == null)
+            throw new NoSuchFileException(name);
+
+        // Resolve URL and verify digest
+        URL url = IOHelper.getResourceURL(prefix + '/' + name);
+        if (!Arrays.equals(validDigest, SecurityHelper.digest(SecurityHelper.DigestAlgorithm.MD5, url)))
+            throw new NoSuchFileException(name); // Digest mismatch
+
+        // Return verified URL
+        return url;
+    }
+
     @LauncherAPI
     public static String toHash(UUID uuid) {
         return UUID_PATTERN.matcher(uuid.toString()).replaceAll("");
diff --git a/libLauncher/src/main/java/ru/gravit/utils/helper/UnpackHelper.java b/libLauncher/src/main/java/ru/gravit/utils/helper/UnpackHelper.java
index d9e14b9f..faf0861d 100644
--- a/libLauncher/src/main/java/ru/gravit/utils/helper/UnpackHelper.java
+++ b/libLauncher/src/main/java/ru/gravit/utils/helper/UnpackHelper.java
@@ -1,13 +1,14 @@
 package ru.gravit.utils.helper;
 
 import java.io.IOException;
+import java.net.URL;
 import java.nio.file.Path;
 import java.util.Arrays;
 
 public class UnpackHelper {
     @SuppressWarnings("ResultOfMethodCallIgnored")
-    public static boolean unpack(String resource, Path target) throws IOException {
-        byte[] orig = IOHelper.read(IOHelper.getResourceURL(resource));
+    public static boolean unpack(URL resource, Path target) throws IOException {
+        byte[] orig = IOHelper.read(resource);
         if(IOHelper.exists(target))
         {
             if(matches(target,orig)) return false;