diff --git a/.changes/fix-signup-birthday.md b/.changes/fix-signup-birthday.md
new file mode 100644
index 0000000..4d8393a
--- /dev/null
+++ b/.changes/fix-signup-birthday.md
@@ -0,0 +1,7 @@
+---
+"algohub": patch:feat
+---
+
+Fixed the issue of not being able to sign up without a birthday.
+
+> All fields are now not required.
diff --git a/src/views/signup.vue b/src/views/signup.vue
index daa994d..6d89f25 100644
--- a/src/views/signup.vue
+++ b/src/views/signup.vue
@@ -183,10 +183,10 @@ const onUpdateProfile = async ({ valid, states }: {
     id: accountStore.account!.id!,
     token: accountStore.account!.token!,
     profile: {
-      nickname: states.nickname!.value,
-      signature: states.signature!.value,
-      sex: states.sex!.value,
-      birthday: states.birthday!.value.toISOString().replace('Z', ''),
+      nickname: states.nickname?.value,
+      signature: states.signature?.value,
+      sex: states.sex?.value,
+      birthday: states.birthday?.value.toISOString().replace('Z', ''),
       avatar: accountStore.account!.avatar,
     }
   })