diff --git a/Pipfile b/Pipfile
index e52e244..f7a0320 100644
--- a/Pipfile
+++ b/Pipfile
@@ -10,7 +10,6 @@ unicodecsv = ">=0.14.1"
 "pdfminer.six" = "==20200104"
 Pillow = ">=7.0.0"
 Wand = "*"
-six = "*"
 
 [dev-packages]
 tox = "*"
diff --git a/pdfplumber/page.py b/pdfplumber/page.py
index 7b5f8d2..2bee830 100644
--- a/pdfplumber/page.py
+++ b/pdfplumber/page.py
@@ -4,7 +4,6 @@ from .table import TableFinder
 from .container import Container
 from copy import copy
 
-from six import string_types
 import re
 lt_pat = re.compile(r"^LT")
 
diff --git a/pdfplumber/utils.py b/pdfplumber/utils.py
index 26d689a..7e04f51 100644
--- a/pdfplumber/utils.py
+++ b/pdfplumber/utils.py
@@ -1,23 +1,11 @@
 from pdfminer.utils import PDFDocEncoding
 from pdfminer.psparser import PSLiteral
 from pdfminer.pdftypes import PDFObjRef
-try:
-    from cdecimal import Decimal, ROUND_HALF_UP
-except ImportError:
-    from decimal import Decimal, ROUND_HALF_UP
+from decimal import Decimal, ROUND_HALF_UP
 import numbers
 from operator import itemgetter
 import itertools
-import six
-
-if six.PY3:
-    from functools import lru_cache as cache
-else:
-    # Python 2 has no lru_cache, so defining as a no-op
-    def cache(**kwargs):
-        def decorator(fn):
-            return fn
-        return decorator
+from functools import lru_cache as cache
 
 DEFAULT_X_TOLERANCE = 3
 DEFAULT_Y_TOLERANCE = 3
@@ -77,7 +65,7 @@ def decode_text(s):
     Adds py3 compatibility to pdfminer's version.
     """
     if type(s) == bytes and s.startswith(b'\xfe\xff'):
-        return six.text_type(s[2:], 'utf-16be', 'ignore')
+        return str(s[2:], 'utf-16be', 'ignore')
     else:
         ords = (ord(c) if type(c) == str else c for c in s)
         return ''.join(PDFDocEncoding[o] for o in ords)
diff --git a/setup.py b/setup.py
index 34bdac6..766163f 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,6 @@ base_reqs = [
     "pycryptodome",
     "unicodecsv>=0.14.1",
     "pdfminer.six==20200104",
-    "six",
     "pillow>=7.0.0",
     "wand"
 ]