diff --git a/CMakeLists.txt b/CMakeLists.txt
index 826a5dbb5..46524dbaa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)
 
-project(TDLib VERSION 1.6.5 LANGUAGES CXX C)
+project(TDLib VERSION 1.6.6 LANGUAGES CXX C)
 
 if (NOT DEFINED CMAKE_INSTALL_LIBDIR)
   set(CMAKE_INSTALL_LIBDIR "lib")
diff --git a/README.md b/README.md
index e9be2d5e1..922120222 100644
--- a/README.md
+++ b/README.md
@@ -145,7 +145,7 @@ target_link_libraries(YourTarget PRIVATE Td::TdStatic)
 
 Or you could install `TDLib` and then reference it in your CMakeLists.txt like this:
 ```
-find_package(Td 1.6.5 REQUIRED)
+find_package(Td 1.6.6 REQUIRED)
 target_link_libraries(YourTarget PRIVATE Td::TdStatic)
 ```
 See [example/cpp/CMakeLists.txt](https://github.com/tdlib/td/tree/master/example/cpp/CMakeLists.txt).
diff --git a/example/cpp/CMakeLists.txt b/example/cpp/CMakeLists.txt
index 296a12159..145319c8d 100644
--- a/example/cpp/CMakeLists.txt
+++ b/example/cpp/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 
 project(TdExample VERSION 1.0 LANGUAGES CXX)
 
-find_package(Td 1.6.5 REQUIRED)
+find_package(Td 1.6.6 REQUIRED)
 
 add_executable(tdjson_example tdjson_example.cpp)
 target_link_libraries(tdjson_example PRIVATE Td::TdJson)
diff --git a/example/uwp/extension.vsixmanifest b/example/uwp/extension.vsixmanifest
index 50fd5e6f7..01f05d186 100644
--- a/example/uwp/extension.vsixmanifest
+++ b/example/uwp/extension.vsixmanifest
@@ -1,6 +1,6 @@
 <PackageManifest Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2011">
   <Metadata>
-    <Identity Id="Telegram.Td.UWP" Version="1.6.5" Language="en-US" Publisher="Telegram LLC" />
+    <Identity Id="Telegram.Td.UWP" Version="1.6.6" Language="en-US" Publisher="Telegram LLC" />
     <DisplayName>TDLib for Universal Windows Platform</DisplayName>
     <Description>TDLib is a library for building Telegram clients</Description>
     <MoreInfo>https://core.telegram.org/tdlib</MoreInfo>
diff --git a/td/telegram/Td.h b/td/telegram/Td.h
index 659636837..1d158d9c3 100644
--- a/td/telegram/Td.h
+++ b/td/telegram/Td.h
@@ -230,7 +230,7 @@ class Td final : public NetQueryCallback {
   static td_api::object_ptr<td_api::Object> static_request(td_api::object_ptr<td_api::Function> function);
 
  private:
-  static constexpr const char *TDLIB_VERSION = "1.6.5";
+  static constexpr const char *TDLIB_VERSION = "1.6.6";
   static constexpr int64 ONLINE_ALARM_ID = 0;
   static constexpr int64 PING_SERVER_ALARM_ID = -1;
   static constexpr int32 PING_SERVER_TIMEOUT = 300;