diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # telegram-bot-api
 
+## 6.7.1 -- 2023-06-26
+
+- Fix Inline Mode (see [#157](https://github.com/fizruk/telegram-bot-simple/pull/157)).
+
 ## 6.7 -- 2023-04-29
 
 ### Bot API 6.6 support
diff --git a/src/Telegram/Bot/API/Internal/Utils.hs b/src/Telegram/Bot/API/Internal/Utils.hs
--- a/src/Telegram/Bot/API/Internal/Utils.hs
+++ b/src/Telegram/Bot/API/Internal/Utils.hs
@@ -106,8 +106,12 @@
     <|> R1 <$> gsomeParseJSON js
 
 addJsonFields :: Value -> [Pair] -> Value
-addJsonFields (Object obj) pairs = Object $  Map.union obj (Map.fromList pairs)
+addJsonFields (Object obj) pairs = Object $  Map.union obj $ Map.fromList (filter (not . isNull) pairs)
 addJsonFields x _ = x
+
+isNull :: Pair -> Bool
+isNull (_, Null) = True
+isNull _ = False
 
 addMultipartFields :: [Input] -> MultipartData tag -> MultipartData tag
 addMultipartFields newFields (MultipartData currenFields files)
diff --git a/src/Telegram/Bot/API/Types/Chat.hs b/src/Telegram/Bot/API/Types/Chat.hs
--- a/src/Telegram/Bot/API/Types/Chat.hs
+++ b/src/Telegram/Bot/API/Types/Chat.hs
@@ -57,6 +57,7 @@
   | ChatTypeGroup
   | ChatTypeSupergroup
   | ChatTypeChannel
+  | ChatTypeSender
   deriving (Generic, Show)
 
 instance ToJSON   ChatType where
diff --git a/telegram-bot-api.cabal b/telegram-bot-api.cabal
--- a/telegram-bot-api.cabal
+++ b/telegram-bot-api.cabal
@@ -1,7 +1,7 @@
 cabal-version: 1.12
 
 name:           telegram-bot-api
-version:        6.7
+version:        6.7.1
 synopsis:       Easy to use library for building Telegram bots. Exports Telegram Bot API.
 description:    Please see the README on Github at <https://github.com/fizruk/telegram-bot-simple#readme>
                 .