diff --git a/CHANGELOG.md b/CHANGELOG.md
index 427c84d0a..6777a08ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,27 @@
+# 5.5.0
+
+Code:
+- compatible with GHC 8.10.7 to support compilation for armv7a.
+- migrate to `crypton` from deprecated `cryptonite` (the seed for DRG is now sha512-hashed).
+- use ChaChaDRG for all random IDs, keys and nonces, only using hashed entropy as seed.
+- more efficient transaction batching in SMP protocol client and server.
+
+Agent:
+- stabilize message reception and delivery, migrate message delivery to database queue.
+- additional event MSGNTF confirming that message received via notification is processed.
+- efficient processing of messages sent to multiple recipients with batched database transactions.
+- new worker abstraction for all queued tasks resilient to race conditions and some database errors.
+- many fixed race conditions.
+- background mode for iOS NSE.
+- additional error reporting to client on critical errors (to be show as alert in the clients).
+- functional api to get worker statistics.
+
+SMP/XFTP servers:
+- fix socket and memory leak on servers with high load (inactive clients without subscriptions are disconnected after set time of inactivity).
+- control port improvements.
+- fix statistics for stored queues, messages and files.
+- make writing to store log atomic (fixes a rare bug in XFTP server).
+
 # 5.4.0
 
 Migrate to GHC 9.6.3
diff --git a/package.yaml b/package.yaml
index db7d4c10a..fe7c8ab15 100644
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: simplexmq
-version: 5.5.0.5
+version: 5.5.0.6
 synopsis: SimpleXMQ message broker
 description: |
   This package includes <./docs/Simplex-Messaging-Server.html server>,
diff --git a/simplexmq.cabal b/simplexmq.cabal
index 6b126d2eb..e1d41c1c9 100644
--- a/simplexmq.cabal
+++ b/simplexmq.cabal
@@ -5,7 +5,7 @@ cabal-version: 1.12
 -- see: https://github.com/sol/hpack
 
 name:           simplexmq
-version:        5.5.0.5
+version:        5.5.0.6
 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/FileTransfer/Server/Main.hs b/src/Simplex/FileTransfer/Server/Main.hs
index acb494e5f..73a690aa7 100644
--- a/src/Simplex/FileTransfer/Server/Main.hs
+++ b/src/Simplex/FileTransfer/Server/Main.hs
@@ -33,7 +33,7 @@ import System.IO (BufferMode (..), hSetBuffering, stderr, stdout)
 import Text.Read (readMaybe)
 
 xftpServerVersion :: String
-xftpServerVersion = "1.2.0.5"
+xftpServerVersion = "1.2.0.6"
 
 xftpServerCLI :: FilePath -> FilePath -> IO ()
 xftpServerCLI cfgPath logPath = do
diff --git a/src/Simplex/Messaging/Notifications/Server/Main.hs b/src/Simplex/Messaging/Notifications/Server/Main.hs
index 7c477861a..f807e1d8f 100644
--- a/src/Simplex/Messaging/Notifications/Server/Main.hs
+++ b/src/Simplex/Messaging/Notifications/Server/Main.hs
@@ -30,7 +30,7 @@ import System.IO (BufferMode (..), hSetBuffering, stderr, stdout)
 import Text.Read (readMaybe)
 
 ntfServerVersion :: String
-ntfServerVersion = "1.7.0.5"
+ntfServerVersion = "1.7.0.6"
 
 defaultSMPBatchDelay :: Int
 defaultSMPBatchDelay = 10000