diff --git a/lib/plankton/plankton.js b/lib/plankton/plankton.js
index 141c529..7275231 100644
--- a/lib/plankton/plankton.js
+++ b/lib/plankton/plankton.js
@@ -12128,6 +12128,12 @@ var lib_plankton;
                             "url": vevent.url,
                         }));
                     }
+                    // categories
+					if ((vevent.categories !== undefined) && (vevent.categories.length > 0)) {
+						content_lines.push(lib_plankton.string.coin("CATEGORIES:{{categories}}", {
+							"categories": vevent.categories.join(","),
+						}));
+					}
                 }
                 content_lines.push("END:VEVENT");
             });