diff --git a/pages/signup.vue b/pages/signup.vue
index 16fc242..5789808 100644
--- a/pages/signup.vue
+++ b/pages/signup.vue
@@ -256,8 +256,8 @@ const valid = ref(false);
 const loading = ref(false);
 const errorMessage = ref('');
 
-// reCAPTCHA v2 state (static, not reactive)
-let recaptchaSiteKey = '';
+// reCAPTCHA v2 state - site key must be reactive for template
+const recaptchaSiteKey = ref('');
 const recaptchaToken = ref('');
 
 // Registration config (static, not reactive)
@@ -450,12 +450,12 @@ onMounted(async () => {
     
     // Set static config values
     if (configs.recaptcha?.siteKey) {
-      recaptchaSiteKey = configs.recaptcha.siteKey;
+      recaptchaSiteKey.value = configs.recaptcha.siteKey;
       console.log('[signup] reCAPTCHA configured');
       
       // Load reCAPTCHA v2 script with delay to prevent render blocking
       setTimeout(() => {
-        loadRecaptchaScript(recaptchaSiteKey);
+        loadRecaptchaScript(recaptchaSiteKey.value);
       }, 100);
     }