diff --git a/src/metadata.jl b/src/metadata.jl
index d80e7c1..16e01b7 100644
--- a/src/metadata.jl
+++ b/src/metadata.jl
@@ -1,5 +1,6 @@
+import Base: UInt8
 import Dates: Date, DateTime
-using DateTimes64: DateTime64, pydatetime_string, datetime_from_pystring 
+using DateTimes64: DateTime64, pydatetime_string, datetime_from_pystring
 
 """NumPy array protocol type string (typestr) format