diff --git a/releng/build-scripts/build/otdt_prerequisites-hipp.sh b/releng/build-scripts/build/otdt_prerequisites-hipp.sh
index 9aa6c35..66ef6f3 100644
--- a/releng/build-scripts/build/otdt_prerequisites-hipp.sh
+++ b/releng/build-scripts/build/otdt_prerequisites-hipp.sh
@@ -36,7 +36,7 @@
 MAP_FILE_PATH=${BASEDIR}/releng/map/otdt.map
 
 # Base dir for finding previous platform build:
-DROPS4=http://download.eclipse.org/eclipse/downloads/drops4
+DROPS4=https://download.eclipse.org/eclipse/downloads/drops4
 
 # Configure ANT:
 ANT_HOME=/shared/common/apache-ant-1.10.5/