diff --git a/requirements.txt b/requirements.txt
index 17a51ec..4c57207 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1 @@
-pandas==1.0.1
 ramda==0.5.5
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 94b0b7e..08e1f81 100644
--- a/setup.py
+++ b/setup.py
@@ -2,13 +2,13 @@
 setup(
   name = 'validium', # How you named your package folder (MyLib)
   packages = ['validium'], # Chose the same as "name"
-  version = '0.1.0', # Start with a small number and increase it with every change you make
+  version = '0.1.1', # Start with a small number and increase it with every change you make
   license= 'MIT', # Chose a license from here: https://help.github.com/articles/licensing-a-repository
   description = 'a utility library for generating chunks of time within a datetime range', # Give a short description about your library
   author = 'Jason Yung',
   author_email = 'json.yung@gmail.com',
   url = 'https://github.com/json2d/validium', # Provide either the link to your github or to your website
-  download_url = 'https://github.com/json2d/validium/archive/v0.1.0.tar.gz',
+  download_url = 'https://github.com/json2d/validium/archive/v0.1.1.tar.gz',
   keywords = ['datetime', 'interval', 'chunks'], # Keywords that define your package best
   install_requires= [],
   classifiers=[
diff --git a/tests/units.py b/tests/units.py
index 5e4c6ec..f224e72 100644
--- a/tests/units.py
+++ b/tests/units.py
@@ -10,7 +10,6 @@
 
 import unittest
 import ramda as R
-import pandas as pd
 
 import validium as V
 
diff --git a/validium/core.py b/validium/core.py
index 07b69fd..c60c267 100644
--- a/validium/core.py
+++ b/validium/core.py
@@ -1,14 +1,14 @@
 class Validator:
 
-  def __init__(self, predicate, fail_msg=None):
+  def __init__(self, predicate, msg=None):
 
     assert callable(predicate), "the argument 'predicate' must be callable"
-    assert fail_msg is None or isinstance(fail_msg, str), "the argument 'fail_msg' must be None or an instance of str"
+    assert msg is None or isinstance(msg, str), "the argument 'msg' must be None or an instance of str"
 
     self.__dict__ = dict(
       predicate=predicate,
-      fail_msg=fail_msg,
+      msg=msg,
     )
 
   def validate(self, target):
-    assert self.predicate(target), self.fail_msg
\ No newline at end of file
+    assert self.predicate(target), self.msg
\ No newline at end of file