diff --git a/platform/util/zip/apiDump.txt b/platform/util/zip/apiDump.txt
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/platform/util/zip/src/com/intellij/util/lang/ByteBufferCleaner.java b/platform/util/zip/src/com/intellij/util/lang/ByteBufferCleaner.java
index 654e08b7fc28..bdf978fc8a15 100644
--- a/platform/util/zip/src/com/intellij/util/lang/ByteBufferCleaner.java
+++ b/platform/util/zip/src/com/intellij/util/lang/ByteBufferCleaner.java
@@ -1,6 +1,7 @@
-// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.util.lang;
 
+import org.jetbrains.annotations.ApiStatus.Internal;
 import org.jetbrains.annotations.NotNull;
 
 import java.lang.invoke.MethodHandle;
@@ -10,6 +11,7 @@ import java.nio.ByteBuffer;
 
 // we need to unmap buffer immediately without waiting until GC does this job; otherwise further modifications of the created file
 // will fail with AccessDeniedException
+@Internal
 public final class ByteBufferCleaner {
   private static volatile MethodHandle cleaner;
 
diff --git a/platform/util/zip/src/com/intellij/util/lang/InputStreamAccess.java b/platform/util/zip/src/com/intellij/util/lang/InputStreamAccess.java
index 56efca49a396..8dcd2b2e7439 100644
--- a/platform/util/zip/src/com/intellij/util/lang/InputStreamAccess.java
+++ b/platform/util/zip/src/com/intellij/util/lang/InputStreamAccess.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.util.lang;
 
 import java.io.IOException;
@@ -7,7 +7,7 @@ import java.lang.invoke.MethodHandles;
 import java.lang.invoke.VarHandle;
 import java.nio.ByteOrder;
 
-public class InputStreamAccess implements Access<InputStream> {
+class InputStreamAccess implements Access<InputStream> {
   private static final VarHandle LONG_HANDLE = MethodHandles.byteArrayViewVarHandle(long[].class, ByteOrder.LITTLE_ENDIAN);
   private static final VarHandle INT_HANDLE = MethodHandles.byteArrayViewVarHandle(int[].class, ByteOrder.LITTLE_ENDIAN);
 
@@ -16,7 +16,7 @@ public class InputStreamAccess implements Access<InputStream> {
   private final int totalStreamLength;
   private final int totalBlocks;
 
-  public InputStreamAccess(int streamLength) {
+  InputStreamAccess(int streamLength) {
     currentBlock = -1;
     buffer = new byte[Xxh3Impl.getBlockLength()];
     totalStreamLength = streamLength;