diff --git a/src/main/resources/index-config.json b/src/main/resources/index-config.json
index 7721cf48a..adcb82e97 100644
--- a/src/main/resources/index-config.json
+++ b/src/main/resources/index-config.json
@@ -199,6 +199,12 @@
                   "label" : {
                      "index" : "false",
                      "type" : "text"
+                  },
+                  "issn" : {
+                     "type" : "keyword"
+                  },
+                  "isbn" : {
+                     "type" : "keyword"
                   }
                }
             },