diff --git a/reg/src/main/java/org/opencadc/reg/oai/OAIWriter.java b/reg/src/main/java/org/opencadc/reg/oai/OAIWriter.java
index a47fb62..8d7e016 100644
--- a/reg/src/main/java/org/opencadc/reg/oai/OAIWriter.java
+++ b/reg/src/main/java/org/opencadc/reg/oai/OAIWriter.java
@@ -161,7 +161,7 @@ private Document createEnvelopeOAI(URL oaiEndpoint, String oaiRequest) {
         //root.addNamespaceDeclaration(xsd);
         root.addNamespaceDeclaration(xsi);
         root.setAttribute("schemaLocation",
-                          "http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd", xsi);
+                          "http://www.openarchives.org/OAI/2.0/ https://www.openarchives.org/OAI/2.0/OAI-PMH.xsd", xsi);
 
         Document ret = new Document();
         ret.addContent(root);