diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2716924f8..b67bb0307 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# 3.1.0
+
+SMP server and agent:
+
+- SMP protocol v4: batching multiple server commands/responses in a transport block.
+
 # 3.0.0
 
 SMP server:
diff --git a/apps/ntf-server/Main.hs b/apps/ntf-server/Main.hs
index 5222d86f7..ec46e3c25 100644
--- a/apps/ntf-server/Main.hs
+++ b/apps/ntf-server/Main.hs
@@ -42,7 +42,7 @@ ntfServerCLIConfig =
           fingerprintFile = combine cfgPath "fingerprint",
           defaultServerPort = "443",
           executableName = "ntf-server",
-          serverVersion = "SMP notifications server v1.0.1",
+          serverVersion = "SMP notifications server v1.1.0",
           mkIniFile = \enableStoreLog defaultServerPort ->
             "[STORE_LOG]\n\
             \# The server uses STM memory for persistence,\n\
diff --git a/package.yaml b/package.yaml
index f11da43c8..43f366009 100644
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: simplexmq
-version: 3.0.1
+version: 3.1.0
 synopsis: SimpleXMQ message broker
 description: |
   This package includes <./docs/Simplex-Messaging-Server.html server>,
diff --git a/simplexmq.cabal b/simplexmq.cabal
index e5ddcbb4c..871890321 100644
--- a/simplexmq.cabal
+++ b/simplexmq.cabal
@@ -5,7 +5,7 @@ cabal-version: 1.12
 -- see: https://github.com/sol/hpack
 
 name:           simplexmq
-version:        3.0.1
+version:        3.1.0
 synopsis:       SimpleXMQ message broker
 description:    This package includes <./docs/Simplex-Messaging-Server.html server>,
                 <./docs/Simplex-Messaging-Client.html client> and
diff --git a/src/Simplex/Messaging/Transport.hs b/src/Simplex/Messaging/Transport.hs
index 07bfadf52..045be1332 100644
--- a/src/Simplex/Messaging/Transport.hs
+++ b/src/Simplex/Messaging/Transport.hs
@@ -99,7 +99,7 @@ supportedSMPServerVRange :: VersionRange
 supportedSMPServerVRange = mkVersionRange 1 4
 
 simplexMQVersion :: String
-simplexMQVersion = "3.0.1"
+simplexMQVersion = "3.1.0"
 
 -- * Transport connection class