diff --git a/.travis.yml b/.travis.yml
index 45eee94a..ff726c68 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: python
 python:
   - "2.7"
-  - "3.3"
   - "3.4"
   - "3.5"
   - "3.6"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8184ebb5..83f5236f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ This document records all notable changes to Watson. This project adheres to
 * Fixed: dependency version restrictions have been added for Watson and its
   tests for continued support of older (2.7 and 3.3) Python versions
   (#175, #180).
+* Removed: support for Python 3.3 (#210).
 
 ## 1.6.0 (2018-04-23)
 
diff --git a/requirements.txt b/requirements.txt
index e822cccc..b0281ab9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-arrow!=0.11,!=0.12
+arrow!=0.11,!=0.12.0
 click
 requests
diff --git a/setup.py b/setup.py
index 89cf44fe..2fe4c450 100644
--- a/setup.py
+++ b/setup.py
@@ -66,7 +66,6 @@ def parse_requirements(requirements, ignore=('setuptools',)):
         "Programming Language :: Python :: 2",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
diff --git a/tox.ini b/tox.ini
index 471dae8d..d44d6765 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,10 @@
 [tox]
-envlist = flake8,py27,py33,py34,py35,py36
+envlist = flake8,py27,py34,py35,py36
 skip_missing_interpreters = True
 
 [testenv]
 deps =
-    ; pytest 3.3.0 dropped support for Python 3.3
-    py33: pytest<=3.2.5
-    py27,py34,py35,py36: pytest
+    pytest
     py
     mock
     pytest-datafiles