diff --git a/cmd/config.toml b/cmd/config.toml
index b3f4545..ed04d5c 100644
--- a/cmd/config.toml
+++ b/cmd/config.toml
@@ -3,6 +3,9 @@
 secret = "a key"
 # Disable registration
 disabled = false
+# bcrypt cost
+# https://pkg.go.dev/golang.org/x/crypto/bcrypt#pkg-constants
+cost = 10
 
 [server]
 # Listener address
diff --git a/internal/config/config.go b/internal/config/config.go
index 0b8a980..a1e1762 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -26,6 +26,7 @@ type Config struct {
 type Auth struct {
 	Secret   string `toml:"secret"`
 	Disabled bool   `toml:"disabled"`
+	Cost     int    `toml:"cost"`
 }
 
 // Server configuration