diff --git a/go.mod b/go.mod
index dd7dcaf..d88d702 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module git.sr.ht/~sircmpwn/kineto
 
-go 1.15
+go 1.16
 
 require (
 	git.sr.ht/~adnano/go-gemini v0.1.17
diff --git a/main.go b/main.go
index 5d3b09d..283d126 100644
--- a/main.go
+++ b/main.go
@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"html/template"
 	"io"
-	"io/ioutil"
 	"log"
 	"mime"
 	"net/http"
@@ -575,7 +574,7 @@ func main() {
 			bind = opt.Value
 		case 's':
 			external = false
-			cssContent, err := ioutil.ReadFile(opt.Value)
+			cssContent, err := os.ReadFile(opt.Value)
 			if err == nil {
 				css = string(cssContent)
 			} else {