diff --git a/td/telegram/files/FileManager.cpp b/td/telegram/files/FileManager.cpp
index 7a9f4f6f2cfc..5f54a95c96aa 100644
--- a/td/telegram/files/FileManager.cpp
+++ b/td/telegram/files/FileManager.cpp
@@ -51,7 +51,7 @@
 
 namespace td {
 namespace {
-constexpr int64 MAX_FILE_SIZE = 1500 * (1 << 20) /* 1500MB */;
+constexpr int64 MAX_FILE_SIZE = 2000 * (1 << 20) /* 2000MB */;
 }  // namespace
 
 int VERBOSITY_NAME(update_file) = VERBOSITY_NAME(INFO);
diff --git a/td/telegram/files/PartsManager.cpp b/td/telegram/files/PartsManager.cpp
index 8e19f6260a9e..7c8f26441cee 100644
--- a/td/telegram/files/PartsManager.cpp
+++ b/td/telegram/files/PartsManager.cpp
@@ -15,7 +15,6 @@
 #include <numeric>
 
 namespace td {
-/*** PartsManager ***/
 
 namespace {
 int64 calc_part_count(int64 size, int64 part_size) {
diff --git a/td/telegram/files/PartsManager.h b/td/telegram/files/PartsManager.h
index 2f88265a70c0..ebd80a67cd31 100644
--- a/td/telegram/files/PartsManager.h
+++ b/td/telegram/files/PartsManager.h
@@ -13,7 +13,6 @@
 
 namespace td {
 
-/*** PartsManager***/
 struct Part {
   int id;
   int64 offset;
@@ -54,9 +53,9 @@ class PartsManager {
   string get_bitmask();
 
  private:
-  static constexpr int MAX_PART_COUNT = 3000;
-  static constexpr int MAX_PART_SIZE = 512 * (1 << 10);
-  static constexpr int64 MAX_FILE_SIZE = MAX_PART_SIZE * MAX_PART_COUNT;
+  static constexpr int MAX_PART_COUNT = 4000;
+  static constexpr size_t MAX_PART_SIZE = 512 * (1 << 10);
+  static constexpr int64 MAX_FILE_SIZE = static_cast<int64>(MAX_PART_SIZE) * MAX_PART_COUNT;
 
   enum class PartStatus : int32 { Empty, Pending, Ready };
 
diff --git a/tdnet/td/net/HttpReader.h b/tdnet/td/net/HttpReader.h
index 26fc5ec66448..fdb32c0b1681 100644
--- a/tdnet/td/net/HttpReader.h
+++ b/tdnet/td/net/HttpReader.h
@@ -105,7 +105,7 @@ class HttpReader {
   static constexpr size_t MAX_TOTAL_PARAMETERS_LENGTH = 1 << 16;  // Some reasonable limit
   static constexpr size_t MAX_TOTAL_HEADERS_LENGTH = 1 << 18;     // Some reasonable limit
   static constexpr size_t MAX_BOUNDARY_LENGTH = 70;               // As defined by RFC1341
-  static constexpr int64 MAX_FILE_SIZE = 1500 << 20;              // Telegram server file size limit
+  static constexpr int64 MAX_FILE_SIZE = 2000 << 20;              // Telegram server file size limit
   static constexpr const char TEMP_DIRECTORY_PREFIX[] = "tdlib-server-tmp";
 };