diff --git a/api.go b/api.go
index cbfdbac..c1c4c62 100644
--- a/api.go
+++ b/api.go
@@ -1,13 +1,13 @@
 package main
 
 import (
-	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 
 	"github.com/gorilla/mux"
+	jsoniter "github.com/json-iterator/go"
 )
 
 type Response struct {
@@ -46,7 +46,7 @@ func ClaimAddress(w http.ResponseWriter, r *http.Request) {
 	// TODO: middleware for responses that adds this header
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusCreated)
-	json.NewEncoder(w).Encode(response)
+	jsoniter.NewEncoder(w).Encode(response)
 }
 
 func GetUser(w http.ResponseWriter, r *http.Request) {
@@ -69,7 +69,7 @@ func GetUser(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusOK)
-	json.NewEncoder(w).Encode(response)
+	jsoniter.NewEncoder(w).Encode(response)
 }
 
 func UpdateUser(w http.ResponseWriter, r *http.Request) {
@@ -103,7 +103,7 @@ func UpdateUser(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusCreated)
-	json.NewEncoder(w).Encode(response)
+	jsoniter.NewEncoder(w).Encode(response)
 }
 
 func DeleteUser(w http.ResponseWriter, r *http.Request) {
@@ -122,7 +122,7 @@ func DeleteUser(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusOK)
-	json.NewEncoder(w).Encode(response)
+	jsoniter.NewEncoder(w).Encode(response)
 }
 
 // authentication middleware
@@ -174,15 +174,15 @@ func authenticate(next http.Handler) http.Handler {
 
 // helpers
 func sendError(w http.ResponseWriter, code int, msg string, args ...interface{}) {
-	b, _ := json.Marshal(Response{false, fmt.Sprintf(msg, args...), nil})
+	b, _ := jsoniter.Marshal(Response{false, fmt.Sprintf(msg, args...), nil})
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(code)
 	w.Write(b)
 }
 
 func parseParams(r *http.Request) *Params {
-	reqBody, _ := ioutil.ReadAll(r.Body)
+	reqBody, _ := io.ReadAll(r.Body)
 	var params Params
-	json.Unmarshal(reqBody, &params)
+	jsoniter.Unmarshal(reqBody, &params)
 	return &params
 }
diff --git a/db.go b/db.go
index 378f42a..a064687 100644
--- a/db.go
+++ b/db.go
@@ -4,13 +4,13 @@ import (
 	"crypto/hmac"
 	"crypto/sha256"
 	"encoding/hex"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"os"
 	"strings"
 
 	"github.com/cockroachdb/pebble"
+	jsoniter "github.com/json-iterator/go"
 )
 
 type Params struct {
@@ -77,7 +77,7 @@ func SaveName(
 	}
 
 	// save it
-	data, _ := json.Marshal(params)
+	data, _ := jsoniter.Marshal(params)
 	if err := db.Set(key, data, pebble.Sync); err != nil {
 		return "", "", err
 	}
@@ -94,7 +94,7 @@ func GetName(name, domain string) (*Params, error) {
 	defer closer.Close()
 
 	var params Params
-	if err := json.Unmarshal(val, &params); err != nil {
+	if err := jsoniter.Unmarshal(val, &params); err != nil {
 		return nil, err
 	}
 
@@ -117,7 +117,7 @@ func GetAllUsers(domain string) ([]Params, error) {
 		defer closer.Close()
 
 		var params Params
-		if err := json.Unmarshal(val, &params); err != nil {
+		if err := jsoniter.Unmarshal(val, &params); err != nil {
 			return nil, err
 		}
 		params.Domain = domain
@@ -178,7 +178,7 @@ func tryMigrate(old, new string) {
 	for iter.First(); iter.Valid(); iter.Next() {
 		log.Debug().Str("key", string(iter.Key())).Msg("Migrating key")
 		var params Params
-		if err := json.Unmarshal(iter.Value(), &params); err != nil {
+		if err := jsoniter.Unmarshal(iter.Value(), &params); err != nil {
 			log.Debug().Err(err).Msg("Unmarshal error")
 			continue
 		}
@@ -186,7 +186,7 @@ func tryMigrate(old, new string) {
 		params.Domain = old // old database name was domain
 
 		// save it
-		data, err := json.Marshal(params)
+		data, err := jsoniter.Marshal(params)
 		if err != nil {
 			log.Debug().Err(err).Msg("Marshal error")
 			continue
diff --git a/go.mod b/go.mod
index 9e9fd8f..379d9e8 100644
--- a/go.mod
+++ b/go.mod
@@ -17,6 +17,11 @@ require (
 	github.com/tidwall/gjson v1.14.4
 )
 
+require (
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+)
+
 require (
 	github.com/DataDog/zstd v1.5.2 // indirect
 	github.com/SaveTheRbtz/generic-sync-map-go v0.0.0-20230201052002-6c5833b989be // indirect
@@ -55,6 +60,7 @@ require (
 	github.com/imroc/req v0.3.2 // indirect
 	github.com/jb55/lnsocket/go v0.0.0-20220812055138-93307d1bfe4c
 	github.com/joho/godotenv v1.5.1
+	github.com/json-iterator/go v1.1.12
 	github.com/kkdai/bstream v1.0.0 // indirect
 	github.com/klauspost/compress v1.16.4 // indirect
 	github.com/kr/pretty v0.3.1 // indirect
diff --git a/go.sum b/go.sum
index 5b802b4..4c5503b 100644
--- a/go.sum
+++ b/go.sum
@@ -464,6 +464,7 @@ github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/u
 github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
+github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
 github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
@@ -649,6 +650,7 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
+github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/moul/http2curl v1.0.0/go.mod h1:8UbvGypXm98wA/IqH45anm5Y2Z6ep6O31QGOAZ3H0fQ=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
diff --git a/makeinvoice.go b/makeinvoice.go
index e244873..97720a6 100644
--- a/makeinvoice.go
+++ b/makeinvoice.go
@@ -10,7 +10,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -51,7 +51,9 @@ type CommandoParams struct {
 }
 
 func (l CommandoParams) getCert() string { return "" }
-func (l CommandoParams) isTor() bool     { return strings.Index(l.Host, ".onion") != -1 }
+func (l CommandoParams) isTor() bool {
+	return strings.Contains(l.Host, ".onion")
+}
 
 type SparkoParams struct {
 	Cert string
@@ -60,7 +62,9 @@ type SparkoParams struct {
 }
 
 func (l SparkoParams) getCert() string { return l.Cert }
-func (l SparkoParams) isTor() bool     { return strings.Index(l.Host, ".onion") != -1 }
+func (l SparkoParams) isTor() bool {
+	return strings.Contains(l.Host, ".onion")
+}
 
 type LNDParams struct {
 	Cert     string
@@ -69,7 +73,9 @@ type LNDParams struct {
 }
 
 func (l LNDParams) getCert() string { return l.Cert }
-func (l LNDParams) isTor() bool     { return strings.Index(l.Host, ".onion") != -1 }
+func (l LNDParams) isTor() bool {
+	return strings.Contains(l.Host, ".onion")
+}
 
 type LNBitsParams struct {
 	Cert string
@@ -78,7 +84,9 @@ type LNBitsParams struct {
 }
 
 func (l LNBitsParams) getCert() string { return l.Cert }
-func (l LNBitsParams) isTor() bool     { return strings.Index(l.Host, ".onion") != -1 }
+func (l LNBitsParams) isTor() bool {
+	return strings.Contains(l.Host, ".onion")
+}
 
 type LNPayParams struct {
 	PublicAccessKey  string
@@ -95,7 +103,9 @@ type EclairParams struct {
 }
 
 func (l EclairParams) getCert() string { return l.Cert }
-func (l EclairParams) isTor() bool     { return strings.Index(l.Host, ".onion") != -1 }
+func (l EclairParams) isTor() bool {
+	return strings.Contains(l.Host, ".onion")
+}
 
 type StrikeParams struct {
 	Key      string
@@ -203,7 +213,7 @@ func MakeInvoice(params LNParams) (bolt11 string, err error) {
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode >= 300 {
-			body, _ := ioutil.ReadAll(resp.Body)
+			body, _ := io.ReadAll(resp.Body)
 			text := string(body)
 			if len(text) > 300 {
 				text = text[:300]
@@ -211,7 +221,7 @@ func MakeInvoice(params LNParams) (bolt11 string, err error) {
 			return "", fmt.Errorf("call to lnd failed (%d): %s", resp.StatusCode, text)
 		}
 
-		b, err := ioutil.ReadAll(resp.Body)
+		b, err := io.ReadAll(resp.Body)
 		if err != nil {
 			return "", err
 		}
@@ -251,7 +261,7 @@ func MakeInvoice(params LNParams) (bolt11 string, err error) {
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode >= 300 {
-			body, _ := ioutil.ReadAll(resp.Body)
+			body, _ := io.ReadAll(resp.Body)
 			text := string(body)
 			if len(text) > 300 {
 				text = text[:300]
@@ -260,7 +270,7 @@ func MakeInvoice(params LNParams) (bolt11 string, err error) {
 		}
 
 		defer resp.Body.Close()
-		b, err := ioutil.ReadAll(resp.Body)
+		b, err := io.ReadAll(resp.Body)
 		if err != nil {
 			return "", err
 		}
@@ -336,7 +346,7 @@ func MakeInvoice(params LNParams) (bolt11 string, err error) {
 		}
 		defer res.Body.Close()
 
-		body, err := ioutil.ReadAll(res.Body)
+		body, err := io.ReadAll(res.Body)
 		if err != nil {
 			return "", err
 		}
@@ -360,7 +370,7 @@ func MakeInvoice(params LNParams) (bolt11 string, err error) {
 		}
 		defer res.Body.Close()
 
-		body, err = ioutil.ReadAll(res.Body)
+		body, err = io.ReadAll(res.Body)
 		if err != nil {
 			return "", err
 		}
@@ -406,12 +416,12 @@ func MakeInvoice(params LNParams) (bolt11 string, err error) {
 			} else if resErr.Type == gjson.String {
 				return "", errors.New(resErr.String())
 			}
-			return "", fmt.Errorf("Unknown commando error: '%v'", resErr)
+			return "", fmt.Errorf("unknown commando error: '%v'", resErr)
 		}
 
 		invoice := gjson.Get(body, "result.bolt11")
 		if invoice.Type != gjson.String {
-			return "", fmt.Errorf("No bolt11 result found in invoice response, got %v", body)
+			return "", fmt.Errorf("no bolt11 result found in invoice response, got %v", body)
 		}
 
 		return invoice.String(), nil