diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53be692..8a349d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 # Lista de cambios
 
 
+## v 0.3.1 [04-Ago-21]
+---
+* Fix - Issue #2
+
+
 ## v 0.3.0 [30-Jul-21]
 ---
 * Se agrega soporte para consultar por los últimos X días
diff --git a/VERSION b/VERSION
index 0d91a54..9e11b32 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.3.0
+0.3.1
diff --git a/source/sat/util.py b/source/sat/util.py
index e4f64dc..c3b87f2 100644
--- a/source/sat/util.py
+++ b/source/sat/util.py
@@ -129,9 +129,9 @@ def _to_date(str_date, end=False):
     try:
         parts = str_date.split('-')
         if end:
-            dt = datetime(parts[0], parts[1], parts[2], 23, 59, 59)
+            dt = datetime(int(parts[0]), int(parts[1]), int(parts[2]), 23, 59, 59)
         else:
-            dt = datetime(parts[0], parts[1], parts[2], 0, 0, 0)
+            dt = datetime(int(parts[0]), int(parts[1]), int(parts[2]), 0, 0, 0)
     except Exception as e:
         error = 'Fecha inválida'