diff --git a/cabal.project b/cabal.project
index 409d98cd6..a0a131f76 100644
--- a/cabal.project
+++ b/cabal.project
@@ -1,6 +1,7 @@
 packages: .
 -- packages: . ../direct-sqlcipher ../sqlcipher-simple
 -- packages: . ../hs-socks
+-- packages: . ../http2
 
 source-repository-package
     type: git
@@ -15,7 +16,7 @@ source-repository-package
 source-repository-package
     type: git
     location: https://github.com/kazu-yamamoto/http2.git
-    tag: b3b903e8130a7172b8dfa18b67bcc59620fc0ca0
+    tag: b5a1b7200cf5bc7044af34ba325284271f6dff25
 
 source-repository-package
     type: git
diff --git a/src/Simplex/FileTransfer/Client.hs b/src/Simplex/FileTransfer/Client.hs
index 79f97e32a..4e0499f41 100644
--- a/src/Simplex/FileTransfer/Client.hs
+++ b/src/Simplex/FileTransfer/Client.hs
@@ -59,7 +59,7 @@ data XFTPClient = XFTPClient
 
 data XFTPClientConfig = XFTPClientConfig
   { xftpNetworkConfig :: NetworkConfig,
-    uploadTimeoutPerMb :: Int
+    uploadTimeoutPerMb :: Int64
   }
 
 data XFTPChunkBody = XFTPChunkBody
@@ -134,7 +134,7 @@ sendXFTPCommand XFTPClient {config, http2Client = http2@HTTP2Client {sessionId}}
     liftEither . first PCETransportError $
       xftpEncodeTransmission sessionId (Just pKey) ("", fId, FileCmd (sFileParty @p) cmd)
   let req = H.requestStreaming N.methodPost "/" [] $ streamBody t
-      reqTimeout = (\XFTPChunkSpec {chunkSize} -> (fromIntegral chunkSize * uploadTimeoutPerMb config) `div` mb 1) <$> chunkSpec_
+      reqTimeout = (\XFTPChunkSpec {chunkSize} -> chunkTimeout config chunkSize) <$> chunkSpec_
   HTTP2Response {respBody = body@HTTP2Body {bodyHead}} <- liftEitherError xftpClientError $ sendRequest http2 req reqTimeout
   when (B.length bodyHead /= xftpBlockSize) $ throwError $ PCEResponseError BLOCK
   -- TODO validate that the file ID is the same as in the request?
@@ -185,7 +185,7 @@ downloadXFTPChunk c@XFTPClient {config} rpKey fId chunkSpec@XFTPRcvChunkSpec {fi
       Just chunkPart -> do
         let dhSecret = C.dh' sDhKey rpDhKey
         cbState <- liftEither . first PCECryptoError $ LC.cbInit dhSecret cbNonce
-        let t = (fromIntegral chunkSize * uploadTimeoutPerMb config) `div` mb 1
+        let t = chunkTimeout config chunkSize
         t `timeout` download cbState >>= maybe (throwError PCEResponseTimeout) pure
         where
           download cbState =
@@ -195,6 +195,9 @@ downloadXFTPChunk c@XFTPClient {config} rpKey fId chunkSpec@XFTPRcvChunkSpec {fi
       _ -> throwError $ PCEResponseError NO_FILE
     (r, _) -> throwError . PCEUnexpectedResponse $ bshow r
 
+chunkTimeout :: XFTPClientConfig -> Word32 -> Int
+chunkTimeout config chunkSize = fromIntegral $ (fromIntegral chunkSize * uploadTimeoutPerMb config) `div` mb 1
+
 deleteXFTPChunk :: XFTPClient -> C.APrivateSignKey -> SenderId -> ExceptT XFTPClientError IO ()
 deleteXFTPChunk c spKey sId = sendXFTPCommand c spKey sId FDEL Nothing >>= okResponse
 
diff --git a/src/Simplex/FileTransfer/Client/Main.hs b/src/Simplex/FileTransfer/Client/Main.hs
index 7f9186c73..3b9a838de 100644
--- a/src/Simplex/FileTransfer/Client/Main.hs
+++ b/src/Simplex/FileTransfer/Client/Main.hs
@@ -139,7 +139,7 @@ newtype InfoOptions = InfoOptions
 
 data RandomFileOptions = RandomFileOptions
   { filePath :: FilePath,
-    fileSize :: FileSize Int
+    fileSize :: FileSize Int64
   }
   deriving (Show)
 
@@ -586,7 +586,7 @@ cliRandomFile RandomFileOptions {filePath, fileSize = FileSize size} = do
   putStrLn $ "File created: " <> filePath
   where
     saveRandomFile h sz = do
-      bytes <- getRandomBytes $ min mb' sz
+      bytes <- getRandomBytes $ fromIntegral $ min mb' sz
       B.hPut h bytes
       when (sz > mb') $ saveRandomFile h (sz - mb')
     mb' = mb 1
diff --git a/stack.yaml b/stack.yaml
index f5ee2e7fc..5b2bd9baf 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -49,7 +49,7 @@ extra-deps:
   - github: simplex-chat/aeson
     commit: 3eb66f9a68f103b5f1489382aad89f5712a64db7
   - github: kazu-yamamoto/http2
-    commit: b3b903e8130a7172b8dfa18b67bcc59620fc0ca0
+    commit: b5a1b7200cf5bc7044af34ba325284271f6dff25
   # - ../direct-sqlcipher
   - github: simplex-chat/direct-sqlcipher
     commit: 34309410eb2069b029b8fc1872deb1e0db123294
diff --git a/tests/AgentTests/NotificationTests.hs b/tests/AgentTests/NotificationTests.hs
index 44c147b1e..83d973015 100644
--- a/tests/AgentTests/NotificationTests.hs
+++ b/tests/AgentTests/NotificationTests.hs
@@ -34,7 +34,6 @@ import qualified Simplex.Messaging.Protocol as SMP
 import Simplex.Messaging.Transport (ATransport)
 import Simplex.Messaging.Util (tryE)
 import System.Directory (doesFileExist, removeFile)
-import System.Info (os)
 import Test.Hspec
 import UnliftIO