diff --git a/go/vendor/github.com/go-openapi/runtime/middleware/go18.go b/go/vendor/github.com/go-openapi/runtime/middleware/go18.go
new file mode 100644
index 0000000..75c762c
--- /dev/null
+++ b/go/vendor/github.com/go-openapi/runtime/middleware/go18.go
@@ -0,0 +1,9 @@
+// +build go1.8
+
+package middleware
+
+import "net/url"
+
+func pathUnescape(path string) (string, error) {
+	return url.PathUnescape(path)
+}