diff --git a/Dockerfile b/Dockerfile
index e1a424b..587d956 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.15-alpine3.13 as build
+FROM golang:1.16-alpine3.13 as build
 RUN apk add --no-cache git gcc musl-dev sqlite-dev
 ADD *.go /app/
 ADD go.mod /app/
diff --git a/activityPub.go b/activityPub.go
index 4bfe553..c058641 100644
--- a/activityPub.go
+++ b/activityPub.go
@@ -8,10 +8,10 @@ import (
 	"encoding/pem"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"net/url"
+	"os"
 	"regexp"
 	"strings"
 	"sync"
@@ -46,7 +46,7 @@ func initActivityPub() error {
 		p.apDelete()
 	})
 	// Read key and prepare signing
-	pkfile, err := ioutil.ReadFile(appConfig.ActivityPub.KeyPath)
+	pkfile, err := os.ReadFile(appConfig.ActivityPub.KeyPath)
 	if err != nil {
 		return err
 	}
diff --git a/activityPubSending.go b/activityPubSending.go
index e20a67a..65105ef 100644
--- a/activityPubSending.go
+++ b/activityPubSending.go
@@ -5,7 +5,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"net/url"
@@ -130,7 +130,7 @@ func apSendSigned(blogIri, to string, activity []byte) error {
 		return err
 	}
 	if !apRequestIsSuccess(resp.StatusCode) {
-		body, _ := ioutil.ReadAll(resp.Body)
+		body, _ := io.ReadAll(resp.Body)
 		_ = resp.Body.Close()
 		return fmt.Errorf("signed request failed with status %d: %s", resp.StatusCode, string(body))
 	}
diff --git a/authentication.go b/authentication.go
index 4d7ffa9..29619b9 100644
--- a/authentication.go
+++ b/authentication.go
@@ -5,7 +5,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"time"
 
@@ -44,7 +43,7 @@ func authMiddleware(next http.Handler) http.Handler {
 		// 3. Show login form
 		w.WriteHeader(http.StatusUnauthorized)
 		h, _ := json.Marshal(r.Header.Clone())
-		b, _ := ioutil.ReadAll(io.LimitReader(r.Body, 2000000)) // Only allow 20 Megabyte
+		b, _ := io.ReadAll(io.LimitReader(r.Body, 2000000)) // Only allow 20 Megabyte
 		_ = r.Body.Close()
 		if len(b) == 0 {
 			// Maybe it's a form
diff --git a/cache.go b/cache.go
index ac261d3..9b79f20 100644
--- a/cache.go
+++ b/cache.go
@@ -5,7 +5,6 @@ import (
 	"crypto/sha256"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"strconv"
@@ -122,7 +121,7 @@ func getCache(key string, next http.Handler, r *http.Request) (item *cacheItem)
 		next.ServeHTTP(recorder, r)
 		// Cache values from recorder
 		result := recorder.Result()
-		body, _ := ioutil.ReadAll(result.Body)
+		body, _ := io.ReadAll(result.Body)
 		_ = result.Body.Close()
 		eTag := result.Header.Get("ETag")
 		if eTag == "" {
diff --git a/captcha.go b/captcha.go
index 5a4961f..9c75a74 100644
--- a/captcha.go
+++ b/captcha.go
@@ -5,7 +5,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"time"
 
@@ -28,7 +27,7 @@ func captchaMiddleware(next http.Handler) http.Handler {
 		// 2. Show Captcha
 		w.WriteHeader(http.StatusUnauthorized)
 		h, _ := json.Marshal(r.Header.Clone())
-		b, _ := ioutil.ReadAll(io.LimitReader(r.Body, 2000000)) // Only allow 20 Megabyte
+		b, _ := io.ReadAll(io.LimitReader(r.Body, 2000000)) // Only allow 20 Megabyte
 		_ = r.Body.Close()
 		if len(b) == 0 {
 			// Maybe it's a form
diff --git a/go.mod b/go.mod
index c02ae6b..85b07b7 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module git.jlel.se/jlelse/GoBlog
 
-go 1.15
+go 1.16
 
 require (
 	codeberg.org/jlelse/tinify v0.0.0-20200123222407-7fc9c21822b0
@@ -54,7 +54,7 @@ require (
 	golang.org/x/mod v0.4.1 // indirect
 	golang.org/x/net v0.0.0-20210119194325-5f4716e94777 // indirect
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
-	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c // indirect
+	golang.org/x/sys v0.0.0-20210216224549-f992740a1bac // indirect
 	golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf // indirect
 	golang.org/x/text v0.3.5 // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
diff --git a/go.sum b/go.sum
index c5c19e5..299b167 100644
--- a/go.sum
+++ b/go.sum
@@ -404,8 +404,8 @@ golang.org/x/sys v0.0.0-20200724161237-0e2f3a69832c/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk=
-golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210216224549-f992740a1bac h1:9glrpwtNjBYgRpb67AZJKHfzj1stG/8BL5H7In2oTC4=
+golang.org/x/sys v0.0.0-20210216224549-f992740a1bac/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf h1:MZ2shdL+ZM/XzY3ZGOnh4Nlpnxz5GSOhOmtHo3iPU6M=
diff --git a/micropubMedia.go b/micropubMedia.go
index d804eee..1acb921 100644
--- a/micropubMedia.go
+++ b/micropubMedia.go
@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime"
 	"mime/multipart"
 	"net/http"
@@ -147,7 +146,7 @@ func tinify(url string, config *configMicropubMedia) (location string, err error
 	}); err != nil {
 		return "", err
 	}
-	tmpFile, err := ioutil.TempFile("", "tiny-*."+fileExtension)
+	tmpFile, err := os.CreateTemp("", "tiny-*."+fileExtension)
 	if err != nil {
 		return "", err
 	}
@@ -200,7 +199,7 @@ func shortPixel(url string, config *configMicropubMedia) (location string, err e
 	} else if resp.StatusCode != http.StatusOK {
 		return "", fmt.Errorf("failed to compress image, status code %d", resp.StatusCode)
 	}
-	tmpFile, err := ioutil.TempFile("", "tiny-*."+fileExtension)
+	tmpFile, err := os.CreateTemp("", "tiny-*."+fileExtension)
 	if err != nil {
 		return "", err
 	}
diff --git a/render.go b/render.go
index 935c692..c2f2900 100644
--- a/render.go
+++ b/render.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
@@ -186,7 +185,7 @@ func initRendering() error {
 		},
 		"jsonFile": func(filename string) *map[string]interface{} {
 			parsed := &map[string]interface{}{}
-			content, err := ioutil.ReadFile(filename)
+			content, err := os.ReadFile(filename)
 			if err != nil {
 				return nil
 			}
diff --git a/templateAssets.go b/templateAssets.go
index 4a1ab1b..7fb467a 100644
--- a/templateAssets.go
+++ b/templateAssets.go
@@ -3,7 +3,6 @@ package main
 import (
 	"crypto/sha1"
 	"fmt"
-	"io/ioutil"
 	"mime"
 	"net/http"
 	"os"
@@ -42,7 +41,7 @@ func initTemplateAssets() (err error) {
 }
 
 func compileAsset(name string) (string, error) {
-	originalContent, err := ioutil.ReadFile(name)
+	originalContent, err := os.ReadFile(name)
 	if err != nil {
 		return "", err
 	}
diff --git a/templateStrings.go b/templateStrings.go
index 05e5c32..138ea25 100644
--- a/templateStrings.go
+++ b/templateStrings.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-	"io/ioutil"
 	"os"
 	"path"
 
@@ -22,7 +21,7 @@ func initTemplateStrings() error {
 	}
 	for _, variant := range variants {
 		variantStrings := map[string]string{}
-		fileContent, err := ioutil.ReadFile(path.Join(stringsDir, variant+variantFileExt))
+		fileContent, err := os.ReadFile(path.Join(stringsDir, variant+variantFileExt))
 		if err != nil {
 			if os.IsNotExist(err) {
 				continue