diff --git a/lemur/certificates/service.py b/lemur/certificates/service.py
index 544c03d8..d9370232 100644
--- a/lemur/certificates/service.py
+++ b/lemur/certificates/service.py
@@ -329,12 +329,14 @@ def render(args):
     """
     query = database.session_query(Certificate)
 
-    time_range = args.pop("time_range")
-    if not time_range:
-        six_month_old = arrow.now()\
-            .shift(months=current_app.config.get("HIDE_EXPIRED_CERTS_AFTER_MONTHS", -6))\
+    show_expired = args.pop("showExpired")
+    if show_expired != 1:
+        one_month_old = arrow.now()\
+            .shift(months=current_app.config.get("HIDE_EXPIRED_CERTS_AFTER_MONTHS", -1))\
             .format("YYYY-MM-DD")
-        query = query.filter(Certificate.not_after > six_month_old)
+        query = query.filter(Certificate.not_after > one_month_old)
+
+    time_range = args.pop("time_range")
 
     destination_id = args.pop("destination_id")
     notification_id = args.pop("notification_id", None)
diff --git a/lemur/certificates/views.py b/lemur/certificates/views.py
index 61a74a59..1a003e78 100644
--- a/lemur/certificates/views.py
+++ b/lemur/certificates/views.py
@@ -347,6 +347,7 @@ class CertificatesList(AuthenticatedResource):
         )
         parser.add_argument("creator", type=str, location="args")
         parser.add_argument("show", type=str, location="args")
+        parser.add_argument("showExpired", type=int, location="args")
 
         args = parser.parse_args()
         args["user"] = g.user