diff --git a/db.go b/db.go
index 4ad89d7..d37c79d 100644
--- a/db.go
+++ b/db.go
@@ -2,7 +2,6 @@ package jounce
 
 import (
 	"database/sql"
-	"errors"
 	"sync"
 
 	_ "github.com/mattn/go-sqlite3"
@@ -27,7 +26,7 @@ type Channel struct {
 }
 
 type DB struct {
-	lock sync.Mutex
+	lock sync.RWMutex
 	db   *sql.DB
 }
 
@@ -46,8 +45,8 @@ func (db *DB) Close() error {
 }
 
 func (db *DB) ListUsers() ([]User, error) {
-	db.lock.Lock()
-	defer db.lock.Unlock()
+	db.lock.RLock()
+	defer db.lock.RUnlock()
 
 	rows, err := db.db.Query("SELECT username, password FROM User")
 	if err != nil {
@@ -75,8 +74,8 @@ func (db *DB) ListUsers() ([]User, error) {
 }
 
 func (db *DB) ListNetworks(username string) ([]Network, error) {
-	db.lock.Lock()
-	defer db.lock.Unlock()
+	db.lock.RLock()
+	defer db.lock.RUnlock()
 
 	rows, err := db.db.Query("SELECT id, addr, nick, username, realname FROM Network WHERE user = ?", username)
 	if err != nil {
@@ -107,8 +106,8 @@ func (db *DB) ListNetworks(username string) ([]Network, error) {
 }
 
 func (db *DB) ListChannels(networkID int64) ([]Channel, error) {
-	db.lock.Lock()
-	defer db.lock.Unlock()
+	db.lock.RLock()
+	defer db.lock.RUnlock()
 
 	rows, err := db.db.Query("SELECT id, name FROM Channel WHERE network = ?", networkID)
 	if err != nil {