diff --git a/README.md b/README.md
index 5a25158..75c4cae 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ $rate->getValue();
 $rate->getDate()->format('Y-m-d');
 
 // Get the EUR/USD rate yesterday
-$rate = Swap::historical('EUR/USD', Carbon::yesterday());
+$rate = Swap::historical('EUR/USD', Carbon\Carbon::yesterday());
 ```
 
 ## Documentation
diff --git a/doc/readme.md b/doc/readme.md
index 6d99a16..c668b19 100644
--- a/doc/readme.md
+++ b/doc/readme.md
@@ -77,7 +77,7 @@ $rate->getValue();
 $rate->getDate()->format('Y-m-d');
 
 // Get the EUR/USD rate yesterday
-$rate = Swap::historical('EUR/USD', Carbon::yesterday());
+$rate = Swap::historical('EUR/USD', Carbon\Carbon::yesterday());
 ```
 
 ## Cache