diff --git a/Dockerfile b/Dockerfile
index f4cf757..b45f2a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,10 +2,10 @@ FROM golang:alpine AS builder
 
 RUN mkdir -p /build/src
 
-ADD https://github.com/VirusTotal/yara/archive/v4.0.5.tar.gz /build/yara-4.0.5.tar.gz
+ADD https://github.com/VirusTotal/yara/archive/v4.0.4.tar.gz /build/yara-4.0.4.tar.gz
 
 RUN apk add --no-cache autoconf automake libtool make gcc g++ openssl-dev pkgconfig
-RUN cd /build; tar xvf yara-4.0.5.tar.gz; cd yara-4.0.5; ./bootstrap.sh; ./configure; make; make install
+RUN cd /build; tar xvf yara-4.0.4.tar.gz; cd yara-4.0.4; ./bootstrap.sh; ./configure; make; make install
 
 ADD . /build/src
 
diff --git a/go.mod b/go.mod
index 7c83f95..0bad021 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.16
 
 require (
 	github.com/beanstalkd/go-beanstalk v0.1.0
-	github.com/hillu/go-yara v1.3.0
+	github.com/hillu/go-yara/v4 v4.0.4
 	github.com/sirupsen/logrus v1.8.0
 	github.com/spf13/afero v1.5.1
 	github.com/spf13/viper v1.7.1
diff --git a/go.sum b/go.sum
index 0a8e5f7..40ddbe1 100644
--- a/go.sum
+++ b/go.sum
@@ -94,8 +94,8 @@ github.com/hashicorp/logutils v1.0.0/go.mod h1:QIAnNjmIWmVIIkWDTG1z5v++HQmx9WQRO
 github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0mNTz8vQ=
 github.com/hashicorp/memberlist v0.1.3/go.mod h1:ajVTdAv/9Im8oMAAj5G31PhhMCZJV2pPBoIllUwCN7I=
 github.com/hashicorp/serf v0.8.2/go.mod h1:6hOLApaqBFA1NXqRQAsxw9QxuDEvNxSQRwA/JwenrHc=
-github.com/hillu/go-yara v1.3.0 h1:d9HklhWmCY9M/2dnFxYbNXDOFDid3HPGw53hdVk4Urg=
-github.com/hillu/go-yara v1.3.0/go.mod h1:KLxCsvD3F8cgVK866UDHi961qbzP+twKjhNdDsuz/2M=
+github.com/hillu/go-yara/v4 v4.0.4 h1:DxKUyCwk6BG2SONtvkpeuYOdjmHMZ5ybqLdaH2POLRw=
+github.com/hillu/go-yara/v4 v4.0.4/go.mod h1:rkb/gSAoO8qcmj+pv6fDZN4tOa3N7R+qqGlEkzT4iys=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
diff --git a/main.go b/main.go
index 469c9cd..c5ecdce 100644
--- a/main.go
+++ b/main.go
@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"github.com/beanstalkd/go-beanstalk"
-	"github.com/hillu/go-yara"
+	"github.com/hillu/go-yara/v4"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/afero"
 	"github.com/spf13/afero/zipfs"
@@ -25,7 +25,7 @@ import (
 
 type Job struct {
 	PasteID string
-	Data []byte
+	Data    []byte
 }
 
 var (
@@ -80,7 +80,7 @@ func main() {
 
 	signal.Notify(ch, syscall.SIGKILL, syscall.SIGTERM, syscall.SIGINT)
 
-	<- ch
+	<-ch
 }
 
 func loadRules(c *yara.Compiler) {
@@ -180,7 +180,7 @@ func watchQueue(c *beanstalk.Conn, jobChan chan Job) {
 		}
 
 		log.WithFields(log.Fields{
-			"id": id,
+			"id":   id,
 			"body": body,
 		}).Debug("Handling job")
 
@@ -202,25 +202,27 @@ func worker(rules *yara.Rules, jobs chan Job) {
 	}
 
 	for {
-		job := <- jobs
+		job := <-jobs
 
 		processJob(s, job)
 	}
 }
 
 func processJob(s *yara.Scanner, job Job) {
-	matched, err := s.ScanMem(job.Data)
+	var m yara.MatchRules
+
+	err := s.SetCallback(&m).ScanMem(job.Data)
 
 	if err != nil {
 		return
 	}
 
 	// Respond with job
-	if len(matched) < 1 {
+	if len(m) < 1 {
 		return
 	}
 
-	quarantine(job.PasteID, matched[0].Rule)
+	quarantine(job.PasteID, m[0].Rule)
 }
 
 func quarantine(pasteId, reason string) {
@@ -228,7 +230,7 @@ func quarantine(pasteId, reason string) {
 
 	v.Set("reason", reason)
 
-	req, err := http.NewRequest(http.MethodPost, viper.GetString("pasteUrl") + "/admin/quarantine/" + pasteId, nil)
+	req, err := http.NewRequest(http.MethodPost, viper.GetString("pasteUrl")+"/admin/quarantine/"+pasteId, nil)
 
 	if err != nil {
 		return
@@ -241,4 +243,4 @@ func quarantine(pasteId, reason string) {
 	}
 
 	defer res.Body.Close()
-}
\ No newline at end of file
+}