diff --git a/exercises/practice/nth-prime/.meta/example.rkt b/exercises/practice/nth-prime/.meta/example.rkt
index d52e03e..2b23f9e 100644
--- a/exercises/practice/nth-prime/.meta/example.rkt
+++ b/exercises/practice/nth-prime/.meta/example.rkt
@@ -1,5 +1,7 @@
 #lang racket
 
+(provide nth-prime)
+
 (define/contract (nth-prime number)
   (-> exact-positive-integer? exact-positive-integer?)
   (let loop ([candidate 2]
@@ -13,8 +15,7 @@
       [else (loop (add1 candidate)
                   count)])))
 
-(define/contract (prime? number)
-  (-> natural? boolean?)
+(define (prime? number)
   (cond
     [(zero? number) #f]
     [(= number 1) #f]
@@ -25,4 +26,4 @@
        (cond
          [(> (expt factor 2) number) #t]
          [(zero? (remainder number factor)) #f]
-         [else (loop (+ factor 2))]))]))
+         [else (loop (+ factor 2))]))]))
\ No newline at end of file
diff --git a/exercises/practice/nth-prime/nth-prime-test.rkt b/exercises/practice/nth-prime/nth-prime-test.rkt
index 7a1c129..b53cb94 100644
--- a/exercises/practice/nth-prime/nth-prime-test.rkt
+++ b/exercises/practice/nth-prime/nth-prime-test.rkt
@@ -22,4 +22,5 @@
                   104743)
      (test-exn "there is no zeroth prime"
                exn:fail? (lambda () (nth-prime 0)))))
+
   (run-tests suite))