diff --git a/adstex.py b/adstex.py
index 859797c..2d70f16 100644
--- a/adstex.py
+++ b/adstex.py
@@ -16,11 +16,11 @@
 from builtins import input
 from collections import defaultdict
 from datetime import date
-from distutils.version import StrictVersion
 from shutil import copyfile
 
 import ads
 import bibtexparser
+import packaging.version
 import requests
 
 try:
@@ -28,7 +28,7 @@
 except ImportError:
     from urllib import unquote
 
-__version__ = "0.3.11"
+__version__ = "0.3.12"
 
 _this_year = date.today().year % 100
 _this_cent = date.today().year // 100
@@ -36,7 +36,7 @@
 _re_comment = re.compile(r"(?<!\\)%.*(?=[\r\n])")
 _re_bib = re.compile(r"\\(?:no)?bibliography\*?(?:(?!\n{2,})\s)*{((?:(?!\n{2,})[^{}])+)}")
 _re_cite = re.compile(
-    r"\\(?:bibentry|[cC]ite[a-zA]{0,7})\*?(?:(?!\n{2,})\s)*(?:(?<!\\)[[<](?:(?!\n{2,}).)*?(?<!\\)[]>](?:(?!\n{2,})\s)*)*{((?:(?!\n{2,})[^{}])+)}",
+    r"\\(?:bibentry|[cC]ite[a-zA]{0,7})\*?(?:(?!\n{2,})\s)*(?:(?<!\\)[\[<](?:(?!\n{2,}).)*?(?<!\\)[\]>](?:(?!\n{2,})\s)*)*{((?:(?!\n{2,})[^{}])+)}",
     re.S,
 )
 _re_fayear = re.compile(r"([A-Za-z-]+)(?:(?=[\W_])[^\s\d,]+)?((?:\d{2})?\d{2})")
@@ -469,7 +469,7 @@ def main():
 
     # check version
     try:
-        latest_version = StrictVersion(
+        latest_version = packaging.version.parse(
             requests.get(
                 "https://pypi.python.org/pypi/adstex/json", timeout=0.1,
             ).json()["info"]["version"]
@@ -477,7 +477,7 @@ def main():
     except (requests.RequestException, KeyError, ValueError):
         pass
     else:
-        if latest_version > StrictVersion(__version__):
+        if latest_version > packaging.version.parse(__version__):
             msg = "A newer version of adstex (v{}) is now available!\n".format(
                 latest_version
             )
diff --git a/setup.py b/setup.py
index a48dd48..380cd62 100644
--- a/setup.py
+++ b/setup.py
@@ -44,7 +44,10 @@
         "Intended Audience :: Science/Research",
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Topic :: Scientific/Engineering :: Astronomy",
     ],
     keywords="bibtex ads",
@@ -53,6 +56,7 @@
         "ads>=0.12.3",
         "bibtexparser>=0.6.2",
         "requests>=2.0",
+        "packaging>=17.0", 
         "future>=0.12.0 ; python_version < '3.0'",
     ],
     entry_points={"console_scripts": ["adstex=adstex:main"]},