diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0718b40..d143eb9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go: ["1.17", "1.18"]
+        go: ["1.21"]
 
     runs-on: ubuntu-20.04
 
diff --git a/benchmark_test.go b/benchmark_test.go
index f76b56c..4ad6b79 100644
--- a/benchmark_test.go
+++ b/benchmark_test.go
@@ -3,13 +3,13 @@ package tasqueue
 import (
 	"context"
 	"log"
+	"log/slog"
 	"sync"
 	"testing"
 
 	"github.com/go-redis/redis"
 	rb "github.com/kalbhor/tasqueue/v2/brokers/redis"
 	rr "github.com/kalbhor/tasqueue/v2/results/redis"
-	"github.com/zerodha/logf"
 )
 
 // The benchmarks use redis as results & broker.
@@ -32,10 +32,7 @@ func newJob(b *testing.B) Job {
 
 // serverWithRedis returns a tasqueue server with redis as broker and results.
 func serverWithRedis(b *testing.B) *Server {
-	lo := logf.New(logf.Opts{
-		Level:       logf.FatalLevel,
-		EnableColor: true,
-	})
+	lo := slog.Default()
 	srv, err := NewServer(ServerOpts{
 		Broker: rb.New(rb.Options{
 			Addrs:    []string{redisAddr},
@@ -47,7 +44,7 @@ func serverWithRedis(b *testing.B) *Server {
 			Password: redisPass,
 			DB:       redisDB,
 		}, lo),
-		Logger: lo,
+		Logger: lo.Handler(),
 	})
 	if err != nil {
 		b.Fatal(err)
diff --git a/brokers/nats-js/broker.go b/brokers/nats-js/broker.go
index 75f4876..deee68e 100644
--- a/brokers/nats-js/broker.go
+++ b/brokers/nats-js/broker.go
@@ -3,16 +3,16 @@ package nats
 import (
 	"context"
 	"fmt"
+	"log/slog"
 	"time"
 
 	"github.com/nats-io/nats.go"
-	"github.com/zerodha/logf"
 )
 
 // Broker is a nats-jetstream based broker implementation.
 type Broker struct {
 	opt  Options
-	log  logf.Logger
+	log  *slog.Logger
 	conn nats.JetStreamContext
 }
 
@@ -27,7 +27,7 @@ type Options struct {
 }
 
 // New() returns a new instance of nats-jetstream broker.
-func New(cfg Options, lo logf.Logger) (*Broker, error) {
+func New(cfg Options, lo *slog.Logger) (*Broker, error) {
 	opt := []nats.Option{}
 
 	if cfg.EnabledAuth {
diff --git a/brokers/redis/broker.go b/brokers/redis/broker.go
index 95f2c22..2bf3c69 100644
--- a/brokers/redis/broker.go
+++ b/brokers/redis/broker.go
@@ -4,11 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"strconv"
 	"time"
 
 	"github.com/go-redis/redis/v8"
-	"github.com/zerodha/logf"
 )
 
 const (
@@ -29,12 +29,12 @@ type Options struct {
 }
 
 type Broker struct {
-	log        logf.Logger
+	log        *slog.Logger
 	conn       redis.UniversalClient
 	pollPeriod time.Duration
 }
 
-func New(o Options, lo logf.Logger) *Broker {
+func New(o Options, lo *slog.Logger) *Broker {
 	pollPeriod := o.PollPeriod
 	if o.PollPeriod == 0 {
 		pollPeriod = DefaultPollPeriod
diff --git a/chains.go b/chains.go
index 93326f1..b1375d6 100644
--- a/chains.go
+++ b/chains.go
@@ -2,10 +2,10 @@ package tasqueue
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 
 	"github.com/google/uuid"
+	"github.com/vmihailenco/msgpack/v5"
 )
 
 // ChainMeta contains fields related to a chain job.
@@ -135,7 +135,7 @@ checkJobs:
 const chainPrefix = "chain:msg:"
 
 func (s *Server) setChainMessage(ctx context.Context, c ChainMessage) error {
-	b, err := json.Marshal(c)
+	b, err := msgpack.Marshal(c)
 	if err != nil {
 		return err
 	}
@@ -149,7 +149,7 @@ func (s *Server) getChainMessage(ctx context.Context, id string) (ChainMessage,
 	}
 
 	var c ChainMessage
-	if err := json.Unmarshal(b, &c); err != nil {
+	if err := msgpack.Unmarshal(b, &c); err != nil {
 		return ChainMessage{}, err
 	}
 
diff --git a/examples/in-memory/main.go b/examples/in-memory/main.go
index 9d5fdf5..ec49560 100644
--- a/examples/in-memory/main.go
+++ b/examples/in-memory/main.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"log/slog"
 	"os"
 	"os/signal"
 	"time"
@@ -14,7 +15,6 @@ import (
 	rb "github.com/kalbhor/tasqueue/v2/brokers/in-memory"
 	"github.com/kalbhor/tasqueue/v2/examples/tasks"
 	rr "github.com/kalbhor/tasqueue/v2/results/in-memory"
-	"github.com/zerodha/logf"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
@@ -78,7 +78,7 @@ func main() {
 	srv, err := tasqueue.NewServer(tasqueue.ServerOpts{
 		Broker:        rb.New(),
 		Results:       rr.New(),
-		Logger:        logf.New(logf.Opts{}),
+		Logger:        slog.Default().Handler(),
 		TraceProvider: tp,
 	})
 	if err != nil {
diff --git a/examples/nats-js/main.go b/examples/nats-js/main.go
index 0546550..cf30bbd 100644
--- a/examples/nats-js/main.go
+++ b/examples/nats-js/main.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
+	"log/slog"
 	"os"
 	"os/signal"
 
@@ -12,12 +13,11 @@ import (
 	nats_broker "github.com/kalbhor/tasqueue/v2/brokers/nats-js"
 	"github.com/kalbhor/tasqueue/v2/examples/tasks"
 	nats_result "github.com/kalbhor/tasqueue/v2/results/nats-js"
-	"github.com/zerodha/logf"
 )
 
 func main() {
 	ctx, _ := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill)
-	lo := logf.New(logf.Opts{})
+	lo := slog.Default()
 	brkr, err := nats_broker.New(nats_broker.Options{
 		URL:         "localhost:4222",
 		EnabledAuth: false,
@@ -40,7 +40,7 @@ func main() {
 	srv, err := tasqueue.NewServer(tasqueue.ServerOpts{
 		Broker:  brkr,
 		Results: res,
-		Logger:  logf.New(logf.Opts{}),
+		Logger:  lo.Handler(),
 	})
 	if err != nil {
 		log.Fatal(err)
diff --git a/examples/redis/main.go b/examples/redis/main.go
index a6d5b38..a1433bd 100644
--- a/examples/redis/main.go
+++ b/examples/redis/main.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
+	"log/slog"
 	"os"
 	"os/signal"
 	"time"
@@ -13,12 +14,11 @@ import (
 	rb "github.com/kalbhor/tasqueue/v2/brokers/redis"
 	"github.com/kalbhor/tasqueue/v2/examples/tasks"
 	rr "github.com/kalbhor/tasqueue/v2/results/redis"
-	"github.com/zerodha/logf"
 )
 
 func main() {
 	ctx, _ := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill)
-	lo := logf.New(logf.Opts{})
+	lo := slog.Default()
 	srv, err := tasqueue.NewServer(tasqueue.ServerOpts{
 		Broker: rb.New(rb.Options{
 			Addrs:    []string{"127.0.0.1:6379"},
@@ -31,7 +31,7 @@ func main() {
 			DB:         0,
 			MetaExpiry: time.Second * 5,
 		}, lo),
-		Logger: lo,
+		Logger: lo.Handler(),
 	})
 	if err != nil {
 		log.Fatal(err)
@@ -70,6 +70,4 @@ func main() {
 		}
 	}
 
-	// Create a task payload.
-	fmt.Println("exit..")
 }
diff --git a/go.mod b/go.mod
index 695b431..185c53f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/kalbhor/tasqueue/v2
 
-go 1.18
+go 1.21
 
 require (
 	github.com/go-redis/redis v6.15.9+incompatible
@@ -9,7 +9,6 @@ require (
 	github.com/nats-io/nats.go v1.28.0
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/vmihailenco/msgpack/v5 v5.3.5
-	github.com/zerodha/logf v0.5.5
 	go.opentelemetry.io/otel v1.9.0
 	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.9.0
 	go.opentelemetry.io/otel/sdk v1.9.0
@@ -26,6 +25,7 @@ require (
 	github.com/nats-io/nats-server/v2 v2.9.21 // indirect
 	github.com/nats-io/nkeys v0.4.4 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
+	github.com/stretchr/testify v1.8.0 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
 	golang.org/x/crypto v0.11.0 // indirect
 	golang.org/x/sys v0.10.0 // indirect
diff --git a/go.sum b/go.sum
index ea3a45f..54e1818 100644
--- a/go.sum
+++ b/go.sum
@@ -2,9 +2,11 @@ github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cb
 github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.2.3 h1:2DntVwHkVopvECVRSlL5PSo9eG+cAkDCuckLubN+rq0=
 github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -19,12 +21,15 @@ github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
+github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/klauspost/compress v1.16.7 h1:2mk3MPGNzKyxErAw8YaohYh69+pa4sIQSC0fPGCFR9I=
 github.com/klauspost/compress v1.16.7/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/minio/highwayhash v1.0.2 h1:Aak5U0nElisjDCfPSG79Tgzkn2gl66NxOMspRrKnA/g=
+github.com/minio/highwayhash v1.0.2/go.mod h1:BQskDq+xkJ12lmlUUi7U0M5Swg3EWR+dLTk+kldvVxY=
 github.com/nats-io/jwt/v2 v2.4.1 h1:Y35W1dgbbz2SQUYDPCaclXcuqleVmpbRa7646Jf2EX4=
+github.com/nats-io/jwt/v2 v2.4.1/go.mod h1:24BeQtRwxRV8ruvC4CojXlx/WQ/VjuwlYiH+vu/+ibI=
 github.com/nats-io/nats-server/v2 v2.9.21 h1:2TBTh0UDE74eNXQmV4HofsmRSCiVN0TH2Wgrp6BD6fk=
 github.com/nats-io/nats-server/v2 v2.9.21/go.mod h1:ozqMZc2vTHcNcblOiXMWIXkf8+0lDGAi5wQcG+O1mHU=
 github.com/nats-io/nats.go v1.28.0 h1:Th4G6zdsz2d0OqXdfzKLClo6bOfoI/b1kInhRtFIy5c=
@@ -34,21 +39,25 @@ github.com/nats-io/nkeys v0.4.4/go.mod h1:XUkxdLPTufzlihbamfzQ7mw/VGx6ObUs+0bN5s
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
 github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
+github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
 github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
+github.com/onsi/ginkgo v1.16.5/go.mod h1:+E8gABHa3K6zRBolWtd+ROzc/U5bkGt0FwiG042wbpU=
 github.com/onsi/gomega v1.18.1 h1:M1GfJqGRrBrrGGsbxzV5dqM2U2ApXefZCQpkukxYRLE=
+github.com/onsi/gomega v1.18.1/go.mod h1:0q+aL8jAiMXy9hbwj2mr5GziHiwhAIQpFmmtT5hitRs=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
 github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/vmihailenco/msgpack/v5 v5.3.5 h1:5gO0H1iULLWGhs2H5tbAHIZTV8/cYafcFOr9znI5mJU=
 github.com/vmihailenco/msgpack/v5 v5.3.5/go.mod h1:7xyJ9e+0+9SaZT0Wt1RGleJXzli6Q/V5KbhBonMG9jc=
 github.com/vmihailenco/tagparser/v2 v2.0.0 h1:y09buUbR+b5aycVFQs/g70pqKVZNBmxwAhO7/IwNM9g=
 github.com/vmihailenco/tagparser/v2 v2.0.0/go.mod h1:Wri+At7QHww0WTrCBeu4J6bNtoV6mEfg5OIWRZA9qds=
-github.com/zerodha/logf v0.5.5 h1:AhxHlixHNYwhFjvlgTv6uO4VBKYKxx2I6SbHoHtWLBk=
-github.com/zerodha/logf v0.5.5/go.mod h1:HWpfKsie+WFFpnUnUxelT6Z0FC6xu9+qt+oXNMPg6y8=
 go.opentelemetry.io/otel v1.9.0 h1:8WZNQFIB2a71LnANS9JeyidJKKGOOremcUtb/OtHISw=
 go.opentelemetry.io/otel v1.9.0/go.mod h1:np4EoPGzoPs3O67xUVNoPPcmSvsfOxNlNA4F4AC+0Eo=
 go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.9.0 h1:0uV0qzHk48i1SF8qRI8odMYiwPOLh9gBhiJFpj8H6JY=
@@ -60,10 +69,13 @@ go.opentelemetry.io/otel/trace v1.9.0/go.mod h1:2737Q0MuG8q1uILYm2YYVkAyLtOofiTN
 golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
 golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=
 golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
+golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/time v0.3.0 h1:rg5rLMjNzMS1RkNLzCG38eapWhnYLFYXDXj2gOlr8j4=
+golang.org/x/time v0.3.0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
@@ -71,6 +83,9 @@ google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs
 google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/groups.go b/groups.go
index c85b790..93b53b1 100644
--- a/groups.go
+++ b/groups.go
@@ -2,10 +2,10 @@ package tasqueue
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 
 	"github.com/google/uuid"
+	"github.com/vmihailenco/msgpack/v5"
 )
 
 type Group struct {
@@ -139,7 +139,7 @@ func getGroupStatus(jobStatus map[string]string) string {
 const groupPrefix = "group:msg:"
 
 func (s *Server) setGroupMessage(ctx context.Context, g GroupMessage) error {
-	b, err := json.Marshal(g)
+	b, err := msgpack.Marshal(g)
 	if err != nil {
 		return err
 	}
@@ -153,7 +153,7 @@ func (s *Server) getGroupMessage(ctx context.Context, id string) (GroupMessage,
 	}
 
 	var g GroupMessage
-	if err := json.Unmarshal(b, &g); err != nil {
+	if err := msgpack.Unmarshal(b, &g); err != nil {
 		return GroupMessage{}, err
 	}
 
diff --git a/jobs.go b/jobs.go
index 7f1492b..a4b78eb 100644
--- a/jobs.go
+++ b/jobs.go
@@ -2,7 +2,6 @@ package tasqueue
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"time"
 
@@ -234,7 +233,7 @@ func (s *Server) setJobMessage(ctx context.Context, t JobMessage) error {
 		defer span.End()
 	}
 
-	b, err := json.Marshal(t)
+	b, err := msgpack.Marshal(t)
 	if err != nil {
 		s.spanError(span, err)
 		return fmt.Errorf("could not set job message in store : %w", err)
@@ -263,7 +262,7 @@ func (s *Server) GetJob(ctx context.Context, id string) (JobMessage, error) {
 	}
 
 	var t JobMessage
-	if err := json.Unmarshal(b, &t); err != nil {
+	if err := msgpack.Unmarshal(b, &t); err != nil {
 		s.spanError(span, err)
 		return JobMessage{}, err
 	}
diff --git a/results/nats-js/results.go b/results/nats-js/results.go
index 989745f..6c247f5 100644
--- a/results/nats-js/results.go
+++ b/results/nats-js/results.go
@@ -3,9 +3,9 @@ package nats
 import (
 	"context"
 	"fmt"
+	"log/slog"
 
 	"github.com/nats-io/nats.go"
-	"github.com/zerodha/logf"
 )
 
 const (
@@ -15,7 +15,7 @@ const (
 
 type Results struct {
 	opt  Options
-	lo   logf.Logger
+	lo   *slog.Logger
 	conn nats.KeyValue
 }
 
@@ -27,7 +27,7 @@ type Options struct {
 }
 
 // New() returns a new instance of nats-jetstream broker.
-func New(cfg Options, lo logf.Logger) (*Results, error) {
+func New(cfg Options, lo *slog.Logger) (*Results, error) {
 	opt := []nats.Option{}
 
 	if cfg.EnabledAuth {
diff --git a/results/redis/results.go b/results/redis/results.go
index 99cfc7c..314d17e 100644
--- a/results/redis/results.go
+++ b/results/redis/results.go
@@ -2,11 +2,11 @@ package redis
 
 import (
 	"context"
+	"log/slog"
 	"strconv"
 	"time"
 
 	"github.com/go-redis/redis/v8"
-	"github.com/zerodha/logf"
 )
 
 const (
@@ -19,7 +19,7 @@ const (
 
 type Results struct {
 	opt  Options
-	lo   logf.Logger
+	lo   *slog.Logger
 	conn redis.UniversalClient
 }
 
@@ -44,7 +44,7 @@ func DefaultRedis() Options {
 	}
 }
 
-func New(o Options, lo logf.Logger) *Results {
+func New(o Options, lo *slog.Logger) *Results {
 	rs := &Results{
 		opt: o,
 		conn: redis.NewUniversalClient(
diff --git a/server.go b/server.go
index e875d9d..bc9077f 100644
--- a/server.go
+++ b/server.go
@@ -4,13 +4,13 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"runtime"
 	"sync"
 	"time"
 
 	"github.com/robfig/cron/v3"
 	"github.com/vmihailenco/msgpack/v5"
-	"github.com/zerodha/logf"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/codes"
 	"go.opentelemetry.io/otel/sdk/trace"
@@ -98,7 +98,7 @@ func (s *Server) RegisterTask(name string, fn handler, opts TaskOpts) error {
 // Server is the main store that holds the broker and the results communication interfaces.
 // It also stores the registered tasks.
 type Server struct {
-	log       logf.Logger
+	log       *slog.Logger
 	broker    Broker
 	results   Results
 	cron      *cron.Cron
@@ -115,7 +115,7 @@ type Server struct {
 type ServerOpts struct {
 	Broker        Broker
 	Results       Results
-	Logger        logf.Logger
+	Logger        slog.Handler
 	TraceProvider *trace.TracerProvider
 }
 
@@ -127,13 +127,13 @@ func NewServer(o ServerOpts) (*Server, error) {
 	if o.Results == nil {
 		return nil, fmt.Errorf("results missing in options")
 	}
-	if o.Logger.Level == 0 {
-		o.Logger = logf.New(logf.Opts{})
+	if o.Logger == nil {
+		o.Logger = slog.Default().Handler()
 	}
 
 	return &Server{
 		traceProv:   o.TraceProvider,
-		log:         o.Logger,
+		log:         slog.New(o.Logger),
 		cron:        cron.New(),
 		broker:      o.Broker,
 		results:     o.Results,
diff --git a/server_test.go b/server_test.go
index c83ea2e..aeb9f3b 100644
--- a/server_test.go
+++ b/server_test.go
@@ -3,11 +3,10 @@ package tasqueue
 import (
 	"encoding/json"
 	"fmt"
+	"log/slog"
 	"testing"
 	"time"
 
-	"github.com/zerodha/logf"
-
 	rb "github.com/kalbhor/tasqueue/v2/brokers/in-memory"
 	rr "github.com/kalbhor/tasqueue/v2/results/in-memory"
 )
@@ -17,9 +16,7 @@ const (
 )
 
 func newServer(t *testing.T, taskName string, handler func([]byte, JobCtx) error) *Server {
-	lo := logf.New(logf.Opts{
-		Level: logf.DebugLevel,
-	})
+	lo := slog.Default().Handler()
 	srv, err := NewServer(ServerOpts{
 		Broker:  rb.New(),
 		Results: rr.New(),