diff --git a/src/Builder.php b/src/Builder.php
index e2e2fc03..8aeaceba 100644
--- a/src/Builder.php
+++ b/src/Builder.php
@@ -215,7 +215,7 @@ public function setHeader($name, $value)
     public function set($name, $value)
     {
         if ($this->signature) {
-            throw new BadMethodCallException('You must unsign before make changes');
+            throw new BadMethodCallException('You must unsign before making changes');
         }
 
         $this->claims[(string) $name] = $this->claimFactory->create($name, $value);