diff --git a/src/request_results.ts b/src/request_results.ts
index 28f4aae..85f6f88 100644
--- a/src/request_results.ts
+++ b/src/request_results.ts
@@ -63,7 +63,15 @@ export enum SignUpResult {
 
 export namespace SignUpResult {
   export function statusCode(result: SignUpResult): number {
-    return result === SignUpResult.BadRequest ? 400 : 200;
+    switch (result) {
+      case SignUpResult.Ok:
+        return 200;
+      case SignUpResult.EmailExists:
+        return 409;
+      case SignUpResult.BadRequest:
+      case SignUpResult.Error:
+        return 400;
+    }
   }
 
   export function success(result: SignUpResult): boolean {
diff --git a/src/server.ts b/src/server.ts
index fff8d1f..97fd0bf 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -244,9 +244,9 @@ app.post([
     result = await signUpEducator(maybe.right);
   } else {
     result = SignUpResult.BadRequest;
-    res.status(400);
   }
-  res.json({
+  const statusCode = SignUpResult.statusCode(result);
+  res.status(statusCode).json({
     educator_info: data,
     status: result,
     success: SignUpResult.success(result)
@@ -266,9 +266,9 @@ app.post([
     result = await signUpStudent(maybe.right);
   } else {
     result = SignUpResult.BadRequest;
-    res.status(400);
   }
-  res.json({
+  const statusCode = SignUpResult.statusCode(result);
+  res.status(statusCode).json({
     student_info: data,
     status: result,
     success: SignUpResult.success(result)