diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/BuildContext.java b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/BuildContext.java
index c8905f15..b04d42f6 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/BuildContext.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/BuildContext.java
@@ -4,6 +4,7 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.HashSet;
 import java.util.Set;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
@@ -13,24 +14,33 @@ public class BuildContext {
     public final ZipOutputStream output;
     public final JAConfigurator config;
     public final JARLauncherBinary data;
+    public final HashSet<String> fileList;
+
 
     public BuildContext(ZipOutputStream output, JAConfigurator config, JARLauncherBinary data) {
         this.output = output;
         this.config = config;
         this.data = data;
+        fileList = new HashSet<>(1024);
     }
 
     public void pushFile(String filename, InputStream inputStream) throws IOException {
         ZipEntry zip = IOHelper.newZipEntry(filename);
         output.putNextEntry(zip);
         IOHelper.transfer(inputStream, output);
+        fileList.add(filename);
     }
 
     public void pushJarFile(ZipInputStream input) throws IOException {
         ZipEntry e = input.getNextEntry();
         while (e != null) {
+            if (fileList.contains(e.getName())) {
+                e = input.getNextEntry();
+                continue;
+            }
             output.putNextEntry(e);
             IOHelper.transfer(input, output);
+            fileList.add(e.getName());
             e = input.getNextEntry();
         }
     }
@@ -44,6 +54,7 @@ public void pushJarFile(ZipInputStream input, Set<String> blacklist) throws IOEx
             }
             output.putNextEntry(e);
             IOHelper.transfer(input, output);
+            fileList.add(e.getName());
             e = input.getNextEntry();
         }
     }
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 7cfe660b..1375dfde 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
@@ -242,6 +242,7 @@ private void stdBuild() throws IOException {
                         }
                     } else
                         IOHelper.transfer(input, output);
+                    context.fileList.add(filename);
                     e = input.getNextEntry();
                 }
             }