diff --git a/api-viewer/PMGAPI.js b/api-viewer/PMGAPI.js
index e4504af..6488e3e 100644
--- a/api-viewer/PMGAPI.js
+++ b/api-viewer/PMGAPI.js
@@ -198,12 +198,12 @@ Ext.onReady(function() {
 
                    var returnhtml;
                    if (retinf.items) {
-                       returnhtml = '<pre>items: ' + JSON.stringify(retinf.items, null, 4) + '</pre>';
+                       returnhtml = '<pre>items: ' + Ext.htmlEncode(JSON.stringify(retinf.items, null, 4)) + '</pre>';
                    }
 
                    if (retinf.properties) {
                        returnhtml = returnhtml || '';
-                       returnhtml += '<pre>properties:' + JSON.stringify(retinf.properties, null, 4);
+                       returnhtml += '<pre>properties:' + Ext.htmlEncode(JSON.stringify(retinf.properties, null, 4)) + '</pre>';
                    }
 
 		   sections.push({