diff --git a/cmd/main.go b/cmd/main.go
index bc4828245..616457b3c 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -29,7 +29,16 @@ Commands:
 	case "daemon":
 		config.ParseFlags(args[1:])
 		logger.Reset()
-		daemon.Daemon()
+		var deborable daemon.DeboraMode
+		if len(args) > 1 {
+			switch args[1] {
+			case "debora":
+				deborable = daemon.DeboraPeerMode
+			case "dev":
+				deborable = daemon.DeboraDevMode
+			}
+		}
+		daemon.Daemon(deborable)
 	case "gen_account":
 		gen_account()
 	case "gen_validator":
diff --git a/config/config.go b/config/config.go
index e8ed21540..5fe767c77 100644
--- a/config/config.go
+++ b/config/config.go
@@ -106,6 +106,8 @@ func initDefaults(rootDir string) {
 	app.SetDefault("PrivValidatorfile", rootDir+"/priv_validator.json")
 
 	app.SetDefault("FastSync", false)
+
+	app.SetDefault("Debora.LogFile", rootDir+"/debora.log")
 }
 
 func Init(rootDir string) {
diff --git a/daemon/daemon.go b/daemon/daemon.go
index d6984a020..b691a48fe 100644
--- a/daemon/daemon.go
+++ b/daemon/daemon.go
@@ -4,6 +4,7 @@ import (
 	"os"
 	"os/signal"
 
+	"github.com/ebuchman/debora"
 	bc "github.com/tendermint/tendermint2/blockchain"
 	. "github.com/tendermint/tendermint2/common"
 	"github.com/tendermint/tendermint2/config"
@@ -172,7 +173,36 @@ func (n *Node) MempoolReactor() *mempl.MempoolReactor {
 	return n.mempoolReactor
 }
 
-func Daemon() {
+// debora variables
+var (
+	AppName   = "tendermint"
+	SrcPath   = "github.com/tendermint/tendermint2/cmd"
+	PublicKey = "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"
+
+	DeboraCallPort = 56565
+)
+
+type DeboraMode int
+
+const (
+	DeboraPeerMode DeboraMode = iota
+	DeboraDevMode
+)
+
+func deboraBroadcast(n *Node) func([]byte) {
+	return func(payload []byte) {
+		msg := &p2p.PexDeboraMessage{Payload: payload}
+		n.sw.Broadcast(p2p.PexChannel, msg)
+	}
+}
+
+func Daemon(deborable DeboraMode) {
+	// Add to debora
+	if deborable == DeboraPeerMode {
+		if err := debora.Add(PublicKey, SrcPath, AppName, config.App().GetString("Debora.LogFile")); err != nil {
+			log.Info("Failed to add program to debora", "error", err)
+		}
+	}
 
 	// Create & start node
 	n := NewNode()
@@ -180,6 +210,11 @@ func Daemon() {
 	n.AddListener(l)
 	n.Start()
 
+	if deborable == DeboraDevMode {
+		log.Info("Running debora-dev server (listen to call)")
+		debora.DebListenAndServe("tendermint", DeboraCallPort, deboraBroadcast(n))
+	}
+
 	// If seedNode is provided by config, dial out.
 	if config.App().GetString("SeedNode") != "" {
 		n.DialSeed()
diff --git a/p2p/pex_reactor.go b/p2p/pex_reactor.go
index c3d82a026..696974341 100644
--- a/p2p/pex_reactor.go
+++ b/p2p/pex_reactor.go
@@ -7,6 +7,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/ebuchman/debora"
 	"github.com/tendermint/tendermint2/binary"
 	. "github.com/tendermint/tendermint2/common"
 )
@@ -115,6 +116,13 @@ func (pexR *PEXReactor) Receive(chId byte, src *Peer, msgBytes []byte) {
 		for _, addr := range msg.(*pexAddrsMessage).Addrs {
 			pexR.book.AddAddress(addr, srcAddr)
 		}
+	case *PexDeboraMessage:
+		srcAddr := src.Connection().RemoteAddress.String()
+		payload := msg.(*PexDeboraMessage).Payload
+		log.Info(fmt.Sprintf("Received debora msg with payload %s or %x", payload, payload))
+		if err := debora.Call(srcAddr, payload); err != nil {
+			log.Info("Debora upgrade call failed.", "error", err)
+		}
 	default:
 		// Ignore unknown message.
 	}
@@ -215,6 +223,7 @@ const (
 	msgTypeRequest   = byte(0x01)
 	msgTypeAddrs     = byte(0x02)
 	msgTypeHandshake = byte(0x03)
+	msgTypeDebora    = byte(0x04)
 )
 
 // TODO: check for unnecessary extra bytes at the end.
@@ -230,6 +239,8 @@ func DecodeMessage(bz []byte) (msg interface{}, err error) {
 		msg = &pexRequestMessage{}
 	case msgTypeAddrs:
 		msg = binary.ReadBinary(&pexAddrsMessage{}, r, n, &err)
+	case msgTypeDebora:
+		msg = binary.ReadBinary(&PexDeboraMessage{}, r, n, &err)
 	default:
 		msg = nil
 	}
@@ -273,3 +284,16 @@ func (m *pexAddrsMessage) TypeByte() byte { return msgTypeAddrs }
 func (m *pexAddrsMessage) String() string {
 	return fmt.Sprintf("[pexAddrs %v]", m.Addrs)
 }
+
+/*
+A pexDeboraMessage requests the node to upgrade its source code
+*/
+type PexDeboraMessage struct {
+	Payload []byte
+}
+
+func (m *PexDeboraMessage) TypeByte() byte { return msgTypeDebora }
+
+func (m *PexDeboraMessage) String() string {
+	return "[pexDebora]"
+}