diff --git a/src/lib/stats.js b/src/lib/stats.js
index 19ef47e..3ced74a 100644
--- a/src/lib/stats.js
+++ b/src/lib/stats.js
@@ -1,2 +1,2 @@
-module.exports.getAvgResolutionTime = tickets => (tickets.reduce((total, ticket) => total + (ticket.closedAt - ticket.createdAt), 0) || 1) / tickets.length;
-module.exports.getAvgResponseTime = tickets => (tickets.reduce((total, ticket) => total + (ticket.firstResponseAt - ticket.createdAt), 0) || 1) / tickets.length;
+module.exports.getAvgResolutionTime = tickets => (tickets.reduce((total, ticket) => total + (ticket.closedAt - ticket.createdAt), 0) || 1) / Math.max(tickets.length, 1);
+module.exports.getAvgResponseTime = tickets => (tickets.reduce((total, ticket) => total + (ticket.firstResponseAt - ticket.createdAt), 0) || 1) / Math.max(tickets.length, 1);