diff --git a/main.go b/main.go
index 8e6fe81..d5a3513 100644
--- a/main.go
+++ b/main.go
@@ -210,15 +210,17 @@ func (c *CheckStorage) eval() bool {
 				}
 				promDockerDataStorageFree.Set(float64(dataSpaceFree))
 				logrus.Debugf("Found 'Data Space Available' value of ", item[1])
-			}
-
-			if item[0] == "Metadata Space Available" {
+			} else if item[0] == "Metadata Space Available" {
 				metadataSpaceFree, err = humanize.ParseBytes(item[1])
 				if err != nil {
 					panic(err)
 				}
 				promDockerMetadataStorageFree.Set(float64(metadataSpaceFree))
 				logrus.Debugf("Found 'Metadata Space Available' value of ", item[1])
+			} else {
+				// we didn't find any of our storage keys
+				logrus.Error("Didn't find storage information from Docker API. Skipping storage evaluation")
+				return true
 			}
 		}
 
diff --git a/vendor.conf b/vendor.conf
index 11818d8..fcce800 100644
--- a/vendor.conf
+++ b/vendor.conf
@@ -2,6 +2,9 @@
 github.com/wjimenez5271/cowcheck
 
 github.com/Sirupsen/logrus        v0.10.0
-github.com/urfave/cli             v1.18.0
 github.com/davecgh/go-spew 346938d642f2ec3594ed81d874461961cd0faa76
-github.com/miekg/dns 113c7538ea6d8f429071f901bd26af59cc9676fe
\ No newline at end of file
+github.com/miekg/dns 113c7538ea6d8f429071f901bd26af59cc9676fe
+github.com/docker/docker/client  v17.03.2-ce
+github.com/dustin/go-humanize bb3d318650d48840a39aa21a027c6630e198e626
+github.com/prometheus/client_golang/prometheus 661e31bf844dfca9aeba15f27ea8aa0d485ad212
+github.com/prometheus/client_golang/prometheus/promhttp 661e31bf844dfca9aeba15f27ea8aa0d485ad212