diff --git a/lib/nbi.coffee b/lib/nbi.coffee
index 7d5d3e6..b39300b 100644
--- a/lib/nbi.coffee
+++ b/lib/nbi.coffee
@@ -61,7 +61,7 @@ TAGS_REGEX = /^\/devices\/([a-zA-Z0-9\-\_\%]+)\/tags\/([a-zA-Z0-9\-\_\%]+)\/?$/
 PRESETS_REGEX = /^\/presets\/([a-zA-Z0-9\-\_\%]+)\/?$/
 OBJECTS_REGEX = /^\/objects\/([a-zA-Z0-9\-\_\%]+)\/?$/
 FILES_REGEX = /^\/files\/([a-zA-Z0-9\%\!\*\'\(\)\;\:\@\&\=\+\$\,\?\#\[\]\-\_\.\~]+)\/?$/
-PING_REGEX = /^\/ping\/([a-zA-Z0-9\-\_\.]+)\/?$/
+PING_REGEX = /^\/ping\/([a-zA-Z0-9\-\_\.\:]+)\/?$/
 QUERY_REGEX = /^\/([a-zA-Z0-9_]+)\/?$/
 DELETE_DEVICE_REGEX = /^\/devices\/([a-zA-Z0-9\-\_\%]+)\/?$/
 PROVISIONS_REGEX = /^\/provisions\/([a-zA-Z0-9\-\_\%]+)\/?$/