diff --git a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/ContentType.java b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/ContentType.java
index 75d9a9e4..a40ee7f1 100644
--- a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/ContentType.java
+++ b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/ContentType.java
@@ -17,10 +17,16 @@ public String forPath(File p) {
     		try {
     			return Files.probeContentType(p.toPath());
     		} catch (Throwable e) {
-    			return null;
+    			return UNIVERSAL.forPath(p);
     		}
 		}
+	},
+	UNIVERSAL {
+		@Override
+		public String forPath(File p) {
+			return "application/octet-stream";
+		}
+		
 	};
-
 	public abstract String forPath(File p);
 }
diff --git a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/fileserver/FileServerHandler.java b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/fileserver/FileServerHandler.java
index 4e146bed..04ca4018 100644
--- a/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/fileserver/FileServerHandler.java
+++ b/LaunchServer/src/main/java/pro/gravit/launchserver/socket/handlers/fileserver/FileServerHandler.java
@@ -34,7 +34,7 @@ public class FileServerHandler extends SimpleChannelInboundHandler<FullHttpReque
     }
     public static final int HTTP_CACHE_SECONDS = VerifyHelper.verifyInt(Integer.parseInt(System.getProperty("launcher.fileserver.cachesec", "60")), VerifyHelper.NOT_NEGATIVE, "HttpCache seconds should be positive");
     private static final boolean OLD_ALGO = Boolean.parseBoolean(System.getProperty("launcher.fileserver.oldalgo", "true"));
-    private static final ContentType TYPE_PROBE = Arrays.stream(ContentType.values()).filter(e -> e.name().toLowerCase(Locale.US).equals(System.getProperty("launcher.fileserver.typeprobe", "nio"))).findFirst().orElse(ContentType.NONE);
+    private static final ContentType TYPE_PROBE = Arrays.stream(ContentType.values()).filter(e -> e.name().toLowerCase(Locale.US).equals(System.getProperty("launcher.fileserver.typeprobe", "nio"))).findFirst().orElse(ContentType.UNIVERSAL);
     private final Path base;
     private final boolean fullOut;
     private final boolean showHiddenFiles;