diff --git a/vendor/github.com/beorn7/perks/quantile/stream.go b/vendor/github.com/beorn7/perks/quantile/stream.go
index 587b1fc..f4cabd6 100644
--- a/vendor/github.com/beorn7/perks/quantile/stream.go
+++ b/vendor/github.com/beorn7/perks/quantile/stream.go
@@ -133,7 +133,7 @@ func (s *Stream) Query(q float64) float64 {
 		if l == 0 {
 			return 0
 		}
-		i := int(float64(l) * q)
+		i := int(math.Ceil(float64(l) * q))
 		if i > 0 {
 			i -= 1
 		}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index dabf346..0f4a501 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -9,10 +9,10 @@
 			"revisionTime": "2016-04-25T09:32:37Z"
 		},
 		{
-			"checksumSHA1": "4QnLdmB1kG3N+KlDd1N+G9TWAGQ=",
+			"checksumSHA1": "spyv5/YFBjYyZLZa1U2LBfDR8PM=",
 			"path": "github.com/beorn7/perks/quantile",
-			"revision": "3ac7bf7a47d159a033b107610db8a1b6575507a4",
-			"revisionTime": "2016-02-29T21:34:45Z"
+			"revision": "4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9",
+			"revisionTime": "2016-08-04T10:47:26Z"
 		},
 		{
 			"checksumSHA1": "yqF125xVSkmfLpIVGrLlfE05IUk=",