diff --git a/register.go b/register.go
index 282f892..b428952 100644
--- a/register.go
+++ b/register.go
@@ -94,6 +94,12 @@ func registerSubmit(c *gin.Context) {
 		return
 	}
 
+	if !db.QueryRow("SELECT 1 FROM beta_keys WHERE key_md5 = ?", cmd5(c.PostForm("key"))).
+		Scan(new(int)) != sql.ErrNoRows {
+		registerResp(c, errorMessage{T(c, "Invalid Beta Key.")})
+		return
+	}
+
 	uMulti, criteria := tryBotnets(c)
 	if criteria != "" {
 		schiavo.CMs.Send(
@@ -126,6 +132,7 @@ func registerSubmit(c *gin.Context) {
 
 	setYCookie(int(lid), c)
 	logIP(c, int(lid))
+	db.Exec("UPDATE beta_keys SET allowed = 0 WHERE key_md5 = ?", cmd5(c.PostForm("key"))
 
 	rd.Incr("ripple:registered_users")
 
diff --git a/templates/register/register.html b/templates/register/register.html
index 63d7f34..4d57e42 100644
--- a/templates/register/register.html
+++ b/templates/register/register.html
@@ -31,6 +31,10 @@
 							<label>{{ .T "Email" }}</label>
 							<input tabindex="3" type="email" name="email" placeholder="{{ .T "Email" }}" value="{{ .FormData.email }}" required>
 						</div>
+						<div class="field">
+							<label>{{ .T "Registration Key" }}</label>
+							<input tabindex="3" type="text" name="key" placeholder="{{ .T "Key" }}" value="{{ .FormData.key }}" required>
+						</div>
 						{{ with config "RecaptchaSite" }}
 						<div class="field">
 							<div class="g-recaptcha" data-sitekey="{{ . }}"></div>