diff --git a/src/actions/signup.ts b/src/actions/signup.ts
index d1d2a14..a797422 100644
--- a/src/actions/signup.ts
+++ b/src/actions/signup.ts
@@ -7,18 +7,18 @@ import { getSetting, SettingKey } from '@util/settings.ts';
 export const signup = {
   signup: defineAction({
     input: z.object({
-      firstname: z.string().min(2),
-      lastname: z.string().min(2),
+      firstname: z.string().trim().min(2),
+      lastname: z.string().trim().min(2),
       // this will be inaccurate as it is evaluated only once
       birthday: z
         .string()
         .date()
         .max(Date.now() - 1000 * 60 * 60 * 24 * 365 * 6),
-      phone: z.string().nullable(),
-      username: z.string(),
+      phone: z.string().trim().nullable(),
+      username: z.string().trim(),
 
-      teamMember: z.string(),
-      teamName: z.string().nullable()
+      teamMember: z.string().trim(),
+      teamName: z.string().trim().nullable()
     }),
     handler: async (input) => {
       // check if signup is allowed