diff --git a/daemon/UPnP.h b/daemon/UPnP.h
index d865df40..2a5fe9f3 100644
--- a/daemon/UPnP.h
+++ b/daemon/UPnP.h
@@ -67,7 +67,7 @@ namespace transport
 			std::unique_ptr<std::thread> m_Thread;
 			std::condition_variable m_Started;
 			std::mutex m_StartedMutex;
-			boost::asio::io_service m_Service;
+			boost::asio::io_context m_Service;
 			boost::asio::deadline_timer m_Timer;
 			bool m_upnpUrlsInitialized = false;
 			struct UPNPUrls m_upnpUrls;
diff --git a/libi2pd/Destination.cpp b/libi2pd/Destination.cpp
index 08acc0ed..a165d5b9 100644
--- a/libi2pd/Destination.cpp
+++ b/libi2pd/Destination.cpp
@@ -23,7 +23,7 @@ namespace i2p
 {
 namespace client
 {
-	LeaseSetDestination::LeaseSetDestination (boost::asio::io_service& service,
+	LeaseSetDestination::LeaseSetDestination (boost::asio::io_context& service,
 		bool isPublic, const std::map<std::string, std::string> * params):
 		m_Service (service), m_IsPublic (isPublic), m_PublishReplyToken (0),
 		m_LastSubmissionTime (0), m_PublishConfirmationTimer (m_Service),
@@ -1000,7 +1000,7 @@ namespace client
 		return i2p::data::CRYPTO_KEY_TYPE_ELGAMAL;
 	}
 
-	ClientDestination::ClientDestination (boost::asio::io_service& service, const i2p::data::PrivateKeys& keys,
+	ClientDestination::ClientDestination (boost::asio::io_context& service, const i2p::data::PrivateKeys& keys,
 		bool isPublic, const std::map<std::string, std::string> * params):
 		LeaseSetDestination (service, isPublic, params),
 		m_Keys (keys), m_StreamingAckDelay (DEFAULT_INITIAL_ACK_DELAY),
diff --git a/libi2pd/Destination.h b/libi2pd/Destination.h
index 8d49ef82..7516c90f 100644
--- a/libi2pd/Destination.h
+++ b/libi2pd/Destination.h
@@ -107,7 +107,7 @@ namespace client
 		// leaseSet = nullptr means not found
 		struct LeaseSetRequest
 		{
-			LeaseSetRequest (boost::asio::io_service& service): requestTime (0), requestTimeoutTimer (service) {};
+			LeaseSetRequest (boost::asio::io_context& service): requestTime (0), requestTimeoutTimer (service) {};
 			std::unordered_set<i2p::data::IdentHash> excluded;
 			uint64_t requestTime;
 			boost::asio::deadline_timer requestTimeoutTimer;
@@ -125,10 +125,10 @@ namespace client
 
 		public:
 
-			LeaseSetDestination (boost::asio::io_service& service, bool isPublic, const std::map<std::string, std::string> * params = nullptr);
+			LeaseSetDestination (boost::asio::io_context& service, bool isPublic, const std::map<std::string, std::string> * params = nullptr);
 			~LeaseSetDestination ();
 			const std::string& GetNickname () const { return m_Nickname; };
-			boost::asio::io_service& GetService () { return m_Service; };
+			auto& GetService () { return m_Service; };
 
 			virtual void Start ();
 			virtual void Stop ();
@@ -195,7 +195,7 @@ namespace client
 
 		private:
 
-			boost::asio::io_service& m_Service;
+			boost::asio::io_context& m_Service;
 			mutable std::mutex m_RemoteLeaseSetsMutex;
 			std::unordered_map<i2p::data::IdentHash, std::shared_ptr<i2p::data::LeaseSet> > m_RemoteLeaseSets;
 			std::unordered_map<i2p::data::IdentHash, std::shared_ptr<LeaseSetRequest> > m_LeaseSetRequests;
@@ -241,7 +241,7 @@ namespace client
 
 		public:
 
-			ClientDestination (boost::asio::io_service& service, const i2p::data::PrivateKeys& keys,
+			ClientDestination (boost::asio::io_context& service, const i2p::data::PrivateKeys& keys,
 				bool isPublic, const std::map<std::string, std::string> * params = nullptr);
 			~ClientDestination ();
 
diff --git a/libi2pd/NTCP2.h b/libi2pd/NTCP2.h
index 27acb529..e1718bb0 100644
--- a/libi2pd/NTCP2.h
+++ b/libi2pd/NTCP2.h
@@ -253,7 +253,7 @@ namespace transport
 
 			void Start ();
 			void Stop ();
-			boost::asio::io_service& GetService () { return GetIOService (); };
+			auto& GetService () { return GetIOService (); };
 			std::mt19937& GetRng () { return m_Rng; };
 
 			bool AddNTCP2Session (std::shared_ptr<NTCP2Session> session, bool incoming = false);
diff --git a/libi2pd/Reseed.cpp b/libi2pd/Reseed.cpp
index f8307a56..13e18d99 100644
--- a/libi2pd/Reseed.cpp
+++ b/libi2pd/Reseed.cpp
@@ -552,7 +552,7 @@ namespace data
 		if (!url.port)
 			url.port = 443;
 
-		boost::asio::io_service service;
+		boost::asio::io_context service;
 		boost::system::error_code ecode;
 
 		boost::asio::ssl::context ctx(boost::asio::ssl::context::sslv23);
@@ -746,7 +746,7 @@ namespace data
 		if (!url.port) url.port = 80;
 
 		boost::system::error_code ecode;
-		boost::asio::io_service service;
+		boost::asio::io_context service;
 		boost::asio::ip::tcp::socket s(service, boost::asio::ip::tcp::v6());
 
 		auto it = boost::asio::ip::tcp::resolver(service).resolve (
diff --git a/libi2pd/SSU2.h b/libi2pd/SSU2.h
index 95f053a9..715e72ab 100644
--- a/libi2pd/SSU2.h
+++ b/libi2pd/SSU2.h
@@ -61,7 +61,7 @@ namespace transport
 			public:
 
 				ReceiveService (const std::string& name): RunnableService (name) {};
-				boost::asio::io_service& GetService () { return GetIOService (); };
+				auto& GetService () { return GetIOService (); };
 				void Start () { StartIOService (); };
 				void Stop () { StopIOService (); };
 		};
@@ -73,7 +73,7 @@ namespace transport
 
 			void Start ();
 			void Stop ();
-			boost::asio::io_service& GetService () { return GetIOService (); };
+			auto& GetService () { return GetIOService (); };
 			void SetLocalAddress (const boost::asio::ip::address& localAddress);
 			bool SetProxy (const std::string& address, uint16_t port);
 			bool UsesProxy () const { return m_IsThroughProxy; };
diff --git a/libi2pd/Streaming.cpp b/libi2pd/Streaming.cpp
index 0569c873..8caccfcf 100644
--- a/libi2pd/Streaming.cpp
+++ b/libi2pd/Streaming.cpp
@@ -66,7 +66,7 @@ namespace stream
 		}
 	}
 
-	Stream::Stream (boost::asio::io_service& service, StreamingDestination& local,
+	Stream::Stream (boost::asio::io_context& service, StreamingDestination& local,
 		std::shared_ptr<const i2p::data::LeaseSet> remote, int port): m_Service (service),
 		m_SendStreamID (0), m_SequenceNumber (0), m_DropWindowDelaySequenceNumber (0),
 		m_TunnelsChangeSequenceNumber (0), m_LastReceivedSequenceNumber (-1), m_PreviousReceivedSequenceNumber (-1),
@@ -95,7 +95,7 @@ namespace stream
 			m_PacketACKInterval = (1000000LL*STREAMING_MTU)/inboundSpeed;
 	}
 
-	Stream::Stream (boost::asio::io_service& service, StreamingDestination& local):
+	Stream::Stream (boost::asio::io_context& service, StreamingDestination& local):
 		m_Service (service), m_SendStreamID (0), m_SequenceNumber (0), m_DropWindowDelaySequenceNumber (0),
 		m_TunnelsChangeSequenceNumber (0), m_LastReceivedSequenceNumber (-1), m_PreviousReceivedSequenceNumber (-1),
 		m_LastConfirmedReceivedSequenceNumber (0), // for limit inbound speed
diff --git a/libi2pd/Streaming.h b/libi2pd/Streaming.h
index 14a4e80b..d2fcc6b9 100644
--- a/libi2pd/Streaming.h
+++ b/libi2pd/Streaming.h
@@ -175,9 +175,9 @@ namespace stream
 	{
 		public:
 
-			Stream (boost::asio::io_service& service, StreamingDestination& local,
+			Stream (boost::asio::io_context& service, StreamingDestination& local,
 				std::shared_ptr<const i2p::data::LeaseSet> remote, int port = 0); // outgoing
-			Stream (boost::asio::io_service& service, StreamingDestination& local); // incoming
+			Stream (boost::asio::io_context& service, StreamingDestination& local); // incoming
 
 			~Stream ();
 			uint32_t GetSendStreamID () const { return m_SendStreamID; };
@@ -255,7 +255,7 @@ namespace stream
 			
 		private:
 
-			boost::asio::io_service& m_Service;
+			boost::asio::io_context& m_Service;
 			uint32_t m_SendStreamID, m_RecvStreamID, m_SequenceNumber;
 			uint32_t m_DropWindowDelaySequenceNumber;
 			uint32_t m_TunnelsChangeSequenceNumber;
diff --git a/libi2pd/Timestamp.cpp b/libi2pd/Timestamp.cpp
index c5c37cd7..51f68ded 100644
--- a/libi2pd/Timestamp.cpp
+++ b/libi2pd/Timestamp.cpp
@@ -60,7 +60,7 @@ namespace util
 	static void SyncTimeWithNTP (const std::string& address)
 	{
 		LogPrint (eLogInfo, "Timestamp: NTP request to ", address);
-		boost::asio::io_service service;
+		boost::asio::io_context service;
 		boost::system::error_code ec;
 		auto it = boost::asio::ip::udp::resolver (service).resolve (
 			boost::asio::ip::udp::resolver::query (address, "ntp"), ec);
diff --git a/libi2pd/Timestamp.h b/libi2pd/Timestamp.h
index d949d416..00c60433 100644
--- a/libi2pd/Timestamp.h
+++ b/libi2pd/Timestamp.h
@@ -52,7 +52,7 @@ namespace util
 
 			bool m_IsRunning;
 			std::unique_ptr<std::thread> m_Thread;
-			boost::asio::io_service m_Service;
+			boost::asio::io_context m_Service;
 			boost::asio::deadline_timer m_Timer;
 			int m_SyncInterval;
 			std::vector<std::string> m_NTPServersList;
diff --git a/libi2pd/Transports.cpp b/libi2pd/Transports.cpp
index b07b1b0b..cd879cb3 100644
--- a/libi2pd/Transports.cpp
+++ b/libi2pd/Transports.cpp
@@ -174,8 +174,8 @@ namespace transport
 	{
 		if (!m_Service)
 		{
-			m_Service = new boost::asio::io_service ();
-			m_Work = new boost::asio::io_service::work (*m_Service);
+			m_Service = new boost::asio::io_context ();
+			m_Work = new boost::asio::io_context::work (*m_Service);
 			m_PeerCleanupTimer = new boost::asio::deadline_timer (*m_Service);
 			m_PeerTestTimer = new boost::asio::deadline_timer (*m_Service);
 			m_UpdateBandwidthTimer = new boost::asio::deadline_timer (*m_Service);
diff --git a/libi2pd/Transports.h b/libi2pd/Transports.h
index 8271108d..431237a3 100644
--- a/libi2pd/Transports.h
+++ b/libi2pd/Transports.h
@@ -139,7 +139,7 @@ namespace transport
 			bool IsOnline() const { return m_IsOnline; };
 			void SetOnline (bool online);
 
-			boost::asio::io_service& GetService () { return *m_Service; };
+			auto& GetService () { return *m_Service; };
 			std::shared_ptr<i2p::crypto::X25519Keys> GetNextX25519KeysPair ();
 			void ReuseX25519KeysPair (std::shared_ptr<i2p::crypto::X25519Keys> pair);
 
@@ -207,8 +207,8 @@ namespace transport
 			volatile bool m_IsOnline;
 			bool m_IsRunning, m_IsNAT, m_CheckReserved;
 			std::thread * m_Thread;
-			boost::asio::io_service * m_Service;
-			boost::asio::io_service::work * m_Work;
+			boost::asio::io_context * m_Service;
+			boost::asio::io_context::work * m_Work;
 			boost::asio::deadline_timer * m_PeerCleanupTimer, * m_PeerTestTimer, * m_UpdateBandwidthTimer;
 
 			SSU2Server * m_SSU2Server;
diff --git a/libi2pd/util.h b/libi2pd/util.h
index 48bcb801..dd065052 100644
--- a/libi2pd/util.h
+++ b/libi2pd/util.h
@@ -177,7 +177,7 @@ namespace util
 			RunnableService (const std::string& name): m_Name (name), m_IsRunning (false) {}
 			virtual ~RunnableService () {}
 
-			boost::asio::io_service& GetIOService () { return m_Service; }
+			auto& GetIOService () { return m_Service; }
 			bool IsRunning () const { return m_IsRunning; };
 
 			void StartIOService ();
@@ -194,7 +194,7 @@ namespace util
 			std::string m_Name;
 			volatile bool m_IsRunning;
 			std::unique_ptr<std::thread> m_Thread;
-			boost::asio::io_service m_Service;
+			boost::asio::io_context m_Service;
 	};
 
 	class RunnableServiceWithWork: public RunnableService
@@ -206,7 +206,7 @@ namespace util
 
 		private:
 
-			boost::asio::io_service::work m_Work;
+			boost::asio::io_context::work m_Work;
 	};
 
 	void SetThreadName (const char *name);
diff --git a/libi2pd_client/BOB.h b/libi2pd_client/BOB.h
index 1f5fda5f..79066154 100644
--- a/libi2pd_client/BOB.h
+++ b/libi2pd_client/BOB.h
@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2023, The PurpleI2P Project
+* Copyright (c) 2013-2024, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -254,7 +254,7 @@ namespace client
 			void Start ();
 			void Stop ();
 
-			boost::asio::io_service& GetService () { return GetIOService (); };
+			auto& GetService () { return GetIOService (); };
 			void AddDestination (const std::string& name, std::shared_ptr<BOBDestination> dest);
 			void DeleteDestination (const std::string& name);
 			std::shared_ptr<BOBDestination> FindDestination (const std::string& name);
diff --git a/libi2pd_client/ClientContext.cpp b/libi2pd_client/ClientContext.cpp
index aa49f83e..72051805 100644
--- a/libi2pd_client/ClientContext.cpp
+++ b/libi2pd_client/ClientContext.cpp
@@ -345,7 +345,7 @@ namespace client
 	}
 
 	std::shared_ptr<ClientDestination> ClientContext::CreateNewLocalDestination (
-		boost::asio::io_service& service, bool isPublic,
+		boost::asio::io_context& service, bool isPublic,
 		i2p::data::SigningKeyType sigType, i2p::data::CryptoKeyType cryptoType,
 		const std::map<std::string, std::string> * params)
 	{
@@ -399,7 +399,7 @@ namespace client
 		return localDestination;
 	}
 
-	std::shared_ptr<ClientDestination> ClientContext::CreateNewLocalDestination (boost::asio::io_service& service,
+	std::shared_ptr<ClientDestination> ClientContext::CreateNewLocalDestination (boost::asio::io_context& service,
 		const i2p::data::PrivateKeys& keys, bool isPublic, const std::map<std::string, std::string> * params)
 	{
 		auto it = m_Destinations.find (keys.GetPublic ()->GetIdentHash ());
diff --git a/libi2pd_client/ClientContext.h b/libi2pd_client/ClientContext.h
index adec607a..febd5f16 100644
--- a/libi2pd_client/ClientContext.h
+++ b/libi2pd_client/ClientContext.h
@@ -79,13 +79,13 @@ namespace client
 				i2p::data::SigningKeyType sigType = i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519,
 				i2p::data::CryptoKeyType cryptoType = i2p::data::CRYPTO_KEY_TYPE_ELGAMAL,
 				const std::map<std::string, std::string> * params = nullptr); // used by SAM only
-			std::shared_ptr<ClientDestination> CreateNewLocalDestination (boost::asio::io_service& service,
+			std::shared_ptr<ClientDestination> CreateNewLocalDestination (boost::asio::io_context& service,
 				bool isPublic = false, i2p::data::SigningKeyType sigType = i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519,
 				i2p::data::CryptoKeyType cryptoType = i2p::data::CRYPTO_KEY_TYPE_ELGAMAL,
 				const std::map<std::string, std::string> * params = nullptr); // same as previous but on external io_service
 			std::shared_ptr<ClientDestination> CreateNewLocalDestination (const i2p::data::PrivateKeys& keys, bool isPublic = true,
 				const std::map<std::string, std::string> * params = nullptr);
-			std::shared_ptr<ClientDestination> CreateNewLocalDestination (boost::asio::io_service& service,
+			std::shared_ptr<ClientDestination> CreateNewLocalDestination (boost::asio::io_context& service,
 				const i2p::data::PrivateKeys& keys, bool isPublic = true,
 				const std::map<std::string, std::string> * params = nullptr); // same as previous but on external io_service
 			std::shared_ptr<ClientDestination> CreateNewMatchedTunnelDestination(const i2p::data::PrivateKeys &keys,
diff --git a/libi2pd_client/I2CP.cpp b/libi2pd_client/I2CP.cpp
index fc6d1b40..7aec7549 100644
--- a/libi2pd_client/I2CP.cpp
+++ b/libi2pd_client/I2CP.cpp
@@ -24,7 +24,7 @@ namespace i2p
 namespace client
 {
 
-	I2CPDestination::I2CPDestination (boost::asio::io_service& service, std::shared_ptr<I2CPSession> owner,
+	I2CPDestination::I2CPDestination (boost::asio::io_context& service, std::shared_ptr<I2CPSession> owner,
 		std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, bool isSameThread,
 	    const std::map<std::string, std::string>& params):
 		LeaseSetDestination (service, isPublic, &params),
diff --git a/libi2pd_client/I2CP.h b/libi2pd_client/I2CP.h
index 620ff52e..e929c1e1 100644
--- a/libi2pd_client/I2CP.h
+++ b/libi2pd_client/I2CP.h
@@ -81,7 +81,7 @@ namespace client
 	{
 		public:
 
-			I2CPDestination (boost::asio::io_service& service, std::shared_ptr<I2CPSession> owner,
+			I2CPDestination (boost::asio::io_context& service, std::shared_ptr<I2CPSession> owner,
 				std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, bool isSameThread, 
 			    const std::map<std::string, std::string>& params);
 			~I2CPDestination () {};
@@ -227,7 +227,7 @@ namespace client
 
 			void Start ();
 			void Stop ();
-			boost::asio::io_service& GetService () { return GetIOService (); };
+			auto& GetService () { return GetIOService (); };
 			bool IsSingleThread () const { return m_IsSingleThread; };
 
 			bool InsertSession (std::shared_ptr<I2CPSession> session);
diff --git a/libi2pd_client/I2PService.h b/libi2pd_client/I2PService.h
index d35c954d..adcc3da7 100644
--- a/libi2pd_client/I2PService.h
+++ b/libi2pd_client/I2PService.h
@@ -61,7 +61,7 @@ namespace client
 			}
 			void CreateStream (StreamRequestComplete streamRequestComplete, const std::string& dest, uint16_t port = 0);
 			void CreateStream(StreamRequestComplete complete, std::shared_ptr<const Address> address, uint16_t port);
-			inline boost::asio::io_service& GetService () { return m_LocalDestination->GetService (); }
+			auto& GetService () { return m_LocalDestination->GetService (); }
 
 			virtual void Start () = 0;
 			virtual void Stop () = 0;
diff --git a/libi2pd_client/SAM.h b/libi2pd_client/SAM.h
index 3ed8f00c..10ef4957 100644
--- a/libi2pd_client/SAM.h
+++ b/libi2pd_client/SAM.h
@@ -246,7 +246,7 @@ namespace client
 			void Start ();
 			void Stop ();
 
-			boost::asio::io_service& GetService () { return GetIOService (); };
+			auto& GetService () { return GetIOService (); };
 			std::shared_ptr<SAMSession> CreateSession (const std::string& id, SAMSessionType type, const std::string& destination, // empty string means transient
 				const std::map<std::string, std::string> * params);
 			bool AddSession (std::shared_ptr<SAMSession> session);