diff --git a/README.md b/README.md
index 6353dd3..5b7327c 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ census-regions
 
 US Census Bureau Regions and Divisions by State
 
-http://www.census.gov/geo/maps-data/maps/pdfs/reference/us_regdiv.pdf
+https://www2.census.gov/geo/pdfs/maps-data/maps/reference/us_regdiv.pdf
 
 converted to CSV.