diff --git a/go.mod b/go.mod
index b546f4e..25b03cd 100644
--- a/go.mod
+++ b/go.mod
@@ -1,21 +1,39 @@
 module github.com/rwynn/monstache/v6
 
+go 1.19
+
 require (
 	github.com/BurntSushi/toml v1.2.1
 	github.com/aws/aws-sdk-go v1.44.239
 	github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf
 	github.com/evanphx/json-patch v5.6.0+incompatible
 	github.com/fsnotify/fsnotify v1.5.1
-	github.com/golang/snappy v0.0.4 // indirect
-	github.com/klauspost/compress v1.15.1 // indirect
-	github.com/kr/pretty v0.2.1 // indirect
-	github.com/kr/text v0.2.0 // indirect
 	github.com/olivere/elastic/v7 v7.0.31
 	github.com/robertkrimen/otto v0.0.0-20211024170158-b87d35c0b86f
 	github.com/rwynn/gtm/v2 v2.1.2
-	go.mongodb.org/mongo-driver v1.11.4
+	go.mongodb.org/mongo-driver v1.11.0
 	gopkg.in/Graylog2/go-gelf.v2 v2.0.0-20191017102106-1550ee647df0
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 )
 
-go 1.13
+require (
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/klauspost/compress v1.15.1 // indirect
+	github.com/kr/pretty v0.2.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/serialx/hashring v0.0.0-20200727003509-22c0c7ab6b1b // indirect
+	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
+	github.com/xdg-go/scram v1.1.1 // indirect
+	github.com/xdg-go/stringprep v1.0.3 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a // indirect
+	golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d // indirect
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
+	golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	gopkg.in/sourcemap.v1 v1.0.5 // indirect
+)
diff --git a/go.sum b/go.sum
index 4782177..16101e0 100644
--- a/go.sum
+++ b/go.sum
@@ -205,7 +205,6 @@ google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlba
 gopkg.in/Graylog2/go-gelf.v2 v2.0.0-20191017102106-1550ee647df0 h1:Xg23ydYYJLmb9AK3XdcEpplHZd1MpN3X2ZeeMoBClmY=
 gopkg.in/Graylog2/go-gelf.v2 v2.0.0-20191017102106-1550ee647df0/go.mod h1:CeDeqW4tj9FrgZXF/dQCWZrBdcZWWBenhJtxLH4On2g=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
diff --git a/monstache.go b/monstache.go
index 44dd9ae..43c1818 100644
--- a/monstache.go
+++ b/monstache.go
@@ -11,7 +11,7 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"math"
 	"net/http"
@@ -1852,7 +1852,7 @@ func (config *configOptions) loadPipelines() {
 			errorLog.Fatalln("Pipelines must specify path or script but not both")
 		}
 		if s.Path != "" {
-			if script, err := ioutil.ReadFile(s.Path); err == nil {
+			if script, err := os.ReadFile(s.Path); err == nil {
 				s.Script = string(script[:])
 			} else {
 				errorLog.Fatalf("Unable to load pipeline at path %s: %s", s.Path, err)
@@ -1892,7 +1892,7 @@ func (config *configOptions) loadFilters() {
 				errorLog.Fatalln("Filters must specify path or script but not both")
 			}
 			if s.Path != "" {
-				if script, err := ioutil.ReadFile(s.Path); err == nil {
+				if script, err := os.ReadFile(s.Path); err == nil {
 					s.Script = string(script[:])
 				} else {
 					errorLog.Fatalf("Unable to load filter at path %s: %s", s.Path, err)
@@ -1949,7 +1949,7 @@ func (config *configOptions) loadScripts() {
 				errorLog.Fatalln("Scripts must specify path or script but not both")
 			}
 			if s.Path != "" {
-				if script, err := ioutil.ReadFile(s.Path); err == nil {
+				if script, err := os.ReadFile(s.Path); err == nil {
 					s.Script = string(script[:])
 				} else {
 					errorLog.Fatalf("Unable to load script at path %s: %s", s.Path, err)
@@ -2051,7 +2051,7 @@ func (config *configOptions) decodeAsTemplate() *configOptions {
 		name, val := pair[0], pair[1]
 		env[name] = val
 	}
-	tpl, err := ioutil.ReadFile(config.ConfigFile)
+	tpl, err := os.ReadFile(config.ConfigFile)
 	if err != nil {
 		errorLog.Fatalln(err)
 	}
@@ -2649,7 +2649,7 @@ func (config *configOptions) loadVariableValueFromFile(name string, path string)
 		return name, "", fmt.Errorf("read value for %s from file failed: %s", name, err)
 	}
 	defer f.Close()
-	c, err := ioutil.ReadAll(f)
+	c, err := io.ReadAll(f)
 	if err != nil {
 		return name, "", fmt.Errorf("read value for %s from file failed: %s", name, err)
 	}
@@ -2899,7 +2899,7 @@ func (config *configOptions) NewHTTPClient() (client *http.Client, err error) {
 	if config.ElasticPemFile != "" {
 		var ca []byte
 		certs := x509.NewCertPool()
-		if ca, err = ioutil.ReadFile(config.ElasticPemFile); err == nil {
+		if ca, err = os.ReadFile(config.ElasticPemFile); err == nil {
 			if ok := certs.AppendCertsFromPEM(ca); !ok {
 				errorLog.Printf("No certs parsed successfully from %s", config.ElasticPemFile)
 			}