1 files changed, 1 insertions, 1 deletions
diff --git a/source.mk b/source.mk
index 9fdd010..3e602b7 100644
--- a/source.mk
+++ b/source.mk
@@ -1,7 +1,7 @@
 # The merged tzdb archive now has a top-level directory as opkbuild requires.
 
 upstream_archive = $(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).tar.lz
-upstream_url_base = http://data.iana.org/time-zones/releases
+upstream_url_base = https://data.iana.org/time-zones/releases
 upstream_url = $(upstream_url_base)/$(upstream_archive)
 source_archive = ../$(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).orig.tar.bz2