diff --git a/src/eddn/core/Validator.py b/src/eddn/core/Validator.py
index e0e4aa3..338180f 100644
--- a/src/eddn/core/Validator.py
+++ b/src/eddn/core/Validator.py
@@ -1,7 +1,7 @@
 # coding: utf8
 
 import simplejson
-import strict-rfc3339
+import strict_rfc3339
 from enum import IntEnum
 from jsonschema import validate as jsValidate, ValidationError, FormatChecker