diff --git a/cabal.project b/cabal.project
index d9d9a1d26b..3b8c5538a1 100644
--- a/cabal.project
+++ b/cabal.project
@@ -5,7 +5,7 @@ constraints: zip +disable-bzip2 +disable-zstd
 source-repository-package
     type: git
     location: https://github.com/simplex-chat/simplexmq.git
-    tag: a8260290e7896a1e75ae595c255171175237cb06
+    tag: 51d0b48ce15433d8473770522b1eb814688d2aea
 
 source-repository-package
     type: git
diff --git a/scripts/nix/sha256map.nix b/scripts/nix/sha256map.nix
index 61e6a6aaa8..fcc28b64f2 100644
--- a/scripts/nix/sha256map.nix
+++ b/scripts/nix/sha256map.nix
@@ -1,5 +1,5 @@
 {
-  "https://github.com/simplex-chat/simplexmq.git"."a8260290e7896a1e75ae595c255171175237cb06" = "0nmndbxzskyg7cmc7m8nviwalrq8144bzz6y7ywpaai36fdjmj5l";
+  "https://github.com/simplex-chat/simplexmq.git"."51d0b48ce15433d8473770522b1eb814688d2aea" = "1v1n96lq9k6cvayqhlc7ywr1zwj2qnnsirv4dilqwl507gb6gqyj";
   "https://github.com/simplex-chat/aeson.git"."3eb66f9a68f103b5f1489382aad89f5712a64db7" = "0kilkx59fl6c3qy3kjczqvm8c3f4n3p0bdk9biyflf51ljnzp4yp";
   "https://github.com/simplex-chat/haskell-terminal.git"."f708b00009b54890172068f168bf98508ffcd495" = "0zmq7lmfsk8m340g47g5963yba7i88n4afa6z93sg9px5jv1mijj";
   "https://github.com/zw3rk/android-support.git"."3c3a5ab0b8b137a072c98d3d0937cbdc96918ddb" = "1r6jyxbim3dsvrmakqfyxbd6ms6miaghpbwyl0sr6dzwpgaprz97";
diff --git a/src/Simplex/Chat.hs b/src/Simplex/Chat.hs
index 5ff8aeaaeb..6db48345cd 100644
--- a/src/Simplex/Chat.hs
+++ b/src/Simplex/Chat.hs
@@ -60,7 +60,6 @@ import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Notifications.Client (NtfServer)
-import Simplex.Messaging.Notifications.Protocol (DeviceToken (..), PushProvider (..))
 import Simplex.Messaging.Parsers (base64P, parseAll)
 import Simplex.Messaging.Protocol (ErrorType (..), MsgBody, MsgFlags (..))
 import qualified Simplex.Messaging.Protocol as SMP
@@ -205,7 +204,8 @@ processChatCommand = \case
   APIStopChat -> do
     ask >>= stopChatController
     pure CRChatStopped
-  APISetAppPhase phase -> withAgent (`setAgentPhase` phase) $> CRCmdOk
+  APIActivateChat -> withAgent activateAgent $> CRCmdOk
+  APISuspendChat t -> withAgent (`suspendAgent` t) $> CRCmdOk
   ResubscribeAllConnections -> withUser (subscribeUserConnections resubscribeConnection) $> CRCmdOk
   SetFilesFolder filesFolder' -> do
     createDirectoryIfMissing True filesFolder'
@@ -1096,7 +1096,7 @@ processAgentMessage Nothing _ _ = throwChatError CENoActiveUser
 processAgentMessage (Just User {userId}) "" agentMessage = case agentMessage of
   DOWN srv conns -> serverEvent srv conns CRContactsDisconnected "disconnected"
   UP srv conns -> serverEvent srv conns CRContactsSubscribed "connected"
-  PHASE phase -> toView $ CRAppPhase phase
+  SUSPENDED -> toView CRChatSuspended
   _ -> pure ()
   where
     serverEvent srv@SMP.ProtocolServer {host, port} conns event str = do
@@ -2250,7 +2250,8 @@ chatCommandP =
     <|> "/_start subscribe=" *> (StartChat <$> ("on" $> True <|> "off" $> False))
     <|> "/_start" $> StartChat True
     <|> "/_stop" $> APIStopChat
-    <|> "/_app phase " *> (APISetAppPhase <$> strP)
+    <|> "/_app activate" $> APIActivateChat
+    <|> "/_app suspend " *> (APISuspendChat <$> A.decimal)
     <|> "/_resubscribe all" $> ResubscribeAllConnections
     <|> "/_files_folder " *> (SetFilesFolder <$> filePath)
     <|> "/_db export " *> (APIExportArchive <$> jsonP)
diff --git a/src/Simplex/Chat/Controller.hs b/src/Simplex/Chat/Controller.hs
index c895fd7cc9..67ab50029d 100644
--- a/src/Simplex/Chat/Controller.hs
+++ b/src/Simplex/Chat/Controller.hs
@@ -101,7 +101,8 @@ data ChatCommand
   | CreateActiveUser Profile
   | StartChat {subscribeConnections :: Bool}
   | APIStopChat
-  | APISetAppPhase AgentPhase
+  | APIActivateChat
+  | APISuspendChat {suspendTimeout :: Int}
   | ResubscribeAllConnections
   | SetFilesFolder FilePath
   | APIExportArchive ArchiveConfig
@@ -185,7 +186,7 @@ data ChatResponse
   | CRChatStarted
   | CRChatRunning
   | CRChatStopped
-  | CRAppPhase {appPhase :: AgentPhase}
+  | CRChatSuspended
   | CRApiChats {chats :: [AChat]}
   | CRApiChat {chat :: AChat}
   | CRLastMessages {chatItems :: [AChatItem]}
diff --git a/src/Simplex/Chat/View.hs b/src/Simplex/Chat/View.hs
index 7808f1ffec..448e9c6582 100644
--- a/src/Simplex/Chat/View.hs
+++ b/src/Simplex/Chat/View.hs
@@ -55,7 +55,7 @@ responseToView testView = \case
   CRChatStarted -> ["chat started"]
   CRChatRunning -> ["chat is running"]
   CRChatStopped -> ["chat stopped"]
-  CRAppPhase p -> ["app phase " <> sShow p]
+  CRChatSuspended -> ["chat suspended"]
   CRApiChats chats -> if testView then testViewChats chats else [plain . bshow $ J.encode chats]
   CRApiChat chat -> if testView then testViewChat chat else [plain . bshow $ J.encode chat]
   CRApiParsedMarkdown ft -> [plain . bshow $ J.encode ft]
diff --git a/stack.yaml b/stack.yaml
index d991665da1..63b756b335 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -49,7 +49,7 @@ extra-deps:
   # - simplexmq-1.0.0@sha256:34b2004728ae396e3ae449cd090ba7410781e2b3cefc59259915f4ca5daa9ea8,8561
   # - ../simplexmq
   - github: simplex-chat/simplexmq
-    commit: a8260290e7896a1e75ae595c255171175237cb06
+    commit: 51d0b48ce15433d8473770522b1eb814688d2aea
   # - terminal-0.2.0.0@sha256:de6770ecaae3197c66ac1f0db5a80cf5a5b1d3b64a66a05b50f442de5ad39570,2977
   - github: simplex-chat/aeson
     commit: 3eb66f9a68f103b5f1489382aad89f5712a64db7