diff --git a/lib/Request.php b/lib/Request.php
index b8395ff..99a13d2 100644
--- a/lib/Request.php
+++ b/lib/Request.php
@@ -4,7 +4,6 @@
 
 namespace Sabre\HTTP;
 
-use LogicException;
 use Sabre\Uri;
 
 /**
diff --git a/lib/functions.php b/lib/functions.php
index af3f394..9ecc175 100644
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -4,9 +4,6 @@
 
 namespace Sabre\HTTP;
 
-use DateTime;
-use InvalidArgumentException;
-
 /**
  * A collection of useful helpers for parsing or generating various HTTP
  * headers.