Use HTTPS for repo1.maven.org
Upstream no longer supports plain HTTP as of today [1].
[1] https://support.sonatype.com/hc/en-us/articles/360041287334
diff --git a/lib/json/test/build.properties b/lib/json/test/build.properties
index 075f640..997aa9b 100644
--- a/lib/json/test/build.properties
+++ b/lib/json/test/build.properties
@@ -5,6 +5,6 @@
json-schema-validator.version=2.2.6
# Maven dependency download locations
-mvn.repo=http://repo1.maven.org/maven2
+mvn.repo=https://repo1.maven.org/maven2
mvn.ant.task.url=${mvn.repo}/org/apache/maven/maven-ant-tasks/${mvn.ant.task.version}
mvn.ant.task.jar=maven-ant-tasks-${mvn.ant.task.version}.jar