diff --git a/benchmark/bench_crypto.cpp b/benchmark/bench_crypto.cpp
index edc74af0..39493025 100644
--- a/benchmark/bench_crypto.cpp
+++ b/benchmark/bench_crypto.cpp
@@ -30,7 +30,7 @@ class SHA1Bench : public td::Benchmark {
   alignas(64) unsigned char data[DATA_SIZE];
 
   std::string get_description() const override {
-    return PSTRING() << "SHA1 OpenSSL [" << (DATA_SIZE >> 10) << "kB]";
+    return PSTRING() << "SHA1 OpenSSL [" << (DATA_SIZE >> 10) << "KB]";
   }
 
   void start_up() override {
@@ -55,7 +55,7 @@ class AESBench : public td::Benchmark {
   td::UInt256 iv;
 
   std::string get_description() const override {
-    return PSTRING() << "AES OpenSSL [" << (DATA_SIZE >> 10) << "kB]";
+    return PSTRING() << "AES OpenSSL [" << (DATA_SIZE >> 10) << "KB]";
   }
 
   void start_up() override {
@@ -152,7 +152,7 @@ class Crc32Bench : public td::Benchmark {
   alignas(64) unsigned char data[DATA_SIZE];
 
   std::string get_description() const override {
-    return PSTRING() << "Crc32 zlib [" << (DATA_SIZE >> 10) << "kB]";
+    return PSTRING() << "Crc32 zlib [" << (DATA_SIZE >> 10) << "KB]";
   }
 
   void start_up() override {
@@ -176,7 +176,7 @@ class Crc64Bench : public td::Benchmark {
   alignas(64) unsigned char data[DATA_SIZE];
 
   std::string get_description() const override {
-    return PSTRING() << "Crc64 Anton [" << (DATA_SIZE >> 10) << "kB]";
+    return PSTRING() << "Crc64 Anton [" << (DATA_SIZE >> 10) << "KB]";
   }
 
   void start_up() override {
diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index 0d09d5a8..57bfcaef 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -1512,7 +1512,7 @@ textEntityTypeTextUrl url:string = TextEntityType;
 textEntityTypeMentionName user_id:int32 = TextEntityType;
 
 
-//@description A thumbnail to be sent along with a file; should be in JPEG or WEBP format for stickers, and less than 200 kB in size @thumbnail Thumbnail file to send. Sending thumbnails by file_id is currently not supported
+//@description A thumbnail to be sent along with a file; should be in JPEG or WEBP format for stickers, and less than 200 KB in size @thumbnail Thumbnail file to send. Sending thumbnails by file_id is currently not supported
 //@width Thumbnail width, usually shouldn't exceed 320. Use 0 if unknown @height Thumbnail height, usually shouldn't exceed 320. Use 0 if unknown
 inputThumbnail thumbnail:InputFile width:int32 height:int32 = InputThumbnail;
 
@@ -2735,7 +2735,7 @@ proxy id:int32 server:string port:int32 last_used_date:int32 is_enabled:Bool typ
 proxies proxies:vector<proxy> = Proxies;
 
 
-//@description Describes a sticker that should be added to a sticker set @png_sticker PNG image with the sticker; must be up to 512 kB in size and fit in a 512x512 square @emojis Emoji corresponding to the sticker @mask_position For masks, position where the mask should be placed; may be null
+//@description Describes a sticker that should be added to a sticker set @png_sticker PNG image with the sticker; must be up to 512 KB in size and fit in a 512x512 square @emojis Emoji corresponding to the sticker @mask_position For masks, position where the mask should be placed; may be null
 inputSticker png_sticker:InputFile emojis:string mask_position:maskPosition = InputSticker;
 
 
@@ -4228,7 +4228,7 @@ checkPhoneNumberConfirmationCode code:string = Ok;
 setBotUpdatesStatus pending_update_count:int32 error_message:string = Ok;
 
 
-//@description Uploads a PNG image with a sticker; for bots only; returns the uploaded file @user_id Sticker file owner @png_sticker PNG image with the sticker; must be up to 512 kB in size and fit in 512x512 square
+//@description Uploads a PNG image with a sticker; for bots only; returns the uploaded file @user_id Sticker file owner @png_sticker PNG image with the sticker; must be up to 512 KB in size and fit in 512x512 square
 uploadStickerFile user_id:int32 png_sticker:InputFile = File;
 
 //@description Creates a new sticker set; for bots only. Returns the newly created sticker set @user_id Sticker set owner @title Sticker set title; 1-64 characters @name Sticker set name. Can contain only English letters, digits and underscores. Must end with *"_by_<bot username>"* (*<bot_username>* is case insensitive); 1-64 characters
diff --git a/td/telegram/files/FileManager.cpp b/td/telegram/files/FileManager.cpp
index 7364a3c5..d1f0476e 100644
--- a/td/telegram/files/FileManager.cpp
+++ b/td/telegram/files/FileManager.cpp
@@ -867,7 +867,7 @@ bool FileManager::are_modification_times_equal(int64 old_mtime, int64 new_mtime)
 }
 
 Status FileManager::check_local_location(FullLocalFileLocation &location, int64 &size) {
-  constexpr int64 MAX_THUMBNAIL_SIZE = 200 * (1 << 10) /* 200 kB */;
+  constexpr int64 MAX_THUMBNAIL_SIZE = 200 * (1 << 10) /* 200 KB */;
   constexpr int64 MAX_PHOTO_SIZE = 10 * (1 << 20) /* 10 MB */;
 
   if (location.path_.empty()) {
diff --git a/tdutils/td/utils/format.h b/tdutils/td/utils/format.h
index e646a583..0cf0f8a2 100644
--- a/tdutils/td/utils/format.h
+++ b/tdutils/td/utils/format.h
@@ -192,7 +192,7 @@ inline StringBuilder &operator<<(StringBuilder &logger, Size t) {
     uint64 value;
   };
 
-  static constexpr NamedValue sizes[] = {{"B", 1}, {"kB", 1 << 10}, {"MB", 1 << 20}, {"GB", 1 << 30}};
+  static constexpr NamedValue sizes[] = {{"B", 1}, {"KB", 1 << 10}, {"MB", 1 << 20}, {"GB", 1 << 30}};
   static constexpr size_t sizes_n = sizeof(sizes) / sizeof(NamedValue);
 
   size_t i = 0;
diff --git a/tdutils/td/utils/port/Stat.cpp b/tdutils/td/utils/port/Stat.cpp
index ff1e20d9..a97e915a 100644
--- a/tdutils/td/utils/port/Stat.cpp
+++ b/tdutils/td/utils/port/Stat.cpp
@@ -251,7 +251,7 @@ Result<MemStat> mem_stat() {
         LOG(ERROR) << "Failed to parse memory stats " << tag("name", name) << tag("value", value);
         *x = static_cast<uint64>(-1);
       } else {
-        *x = r_mem.ok() * 1024;  // memory is in kB
+        *x = r_mem.ok() * 1024;  // memory is in KB
       }
     }
     if (*s == 0) {