diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2ba6d1f5..87fa4872 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -3,7 +3,7 @@ default_language_version:
 
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.1.0
+    rev: v4.2.0
     hooks:
     -   id: check-merge-conflict
     -   id: check-json
@@ -17,11 +17,11 @@ repos:
     -   id: trailing-whitespace
         exclude: README.md
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v2.31.0
+    rev: v2.32.1
     hooks:
     -   id: pyupgrade
 -   repo: https://github.com/ambv/black
-    rev: 21.12b0
+    rev: 22.3.0
     hooks:
     -   id: black
 -   repo: https://github.com/PyCQA/flake8
diff --git a/docs/conf.py b/docs/conf.py
index 26becbc2..0166d4c2 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -64,18 +64,18 @@ source_suffix = ".rst"
 master_doc = "index"
 
 # General information about the project.
-project = u"Graphene"
-copyright = u"Graphene 2016"
-author = u"Syrus Akbary"
+project = "Graphene"
+copyright = "Graphene 2016"
+author = "Syrus Akbary"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = u"1.0"
+version = "1.0"
 # The full version, including alpha/beta/rc tags.
-release = u"1.0"
+release = "1.0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -278,7 +278,7 @@ latex_elements = {
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, "Graphene.tex", u"Graphene Documentation", u"Syrus Akbary", "manual")
+    (master_doc, "Graphene.tex", "Graphene Documentation", "Syrus Akbary", "manual")
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -318,7 +318,7 @@ latex_documents = [
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [(master_doc, "graphene", u"Graphene Documentation", [author], 1)]
+man_pages = [(master_doc, "graphene", "Graphene Documentation", [author], 1)]
 
 # If true, show URL addresses after external links.
 #
@@ -334,7 +334,7 @@ texinfo_documents = [
     (
         master_doc,
         "Graphene",
-        u"Graphene Documentation",
+        "Graphene Documentation",
         author,
         "Graphene",
         "One line description of project.",
diff --git a/graphene/types/scalars.py b/graphene/types/scalars.py
index 472f2d41..867b2242 100644
--- a/graphene/types/scalars.py
+++ b/graphene/types/scalars.py
@@ -143,7 +143,7 @@ class String(Scalar):
     @staticmethod
     def coerce_string(value):
         if isinstance(value, bool):
-            return u"true" if value else u"false"
+            return "true" if value else "false"
         return str(value)
 
     serialize = coerce_string
diff --git a/graphene/types/tests/test_scalar.py b/graphene/types/tests/test_scalar.py
index 2ff67208..9dce6c38 100644
--- a/graphene/types/tests/test_scalar.py
+++ b/graphene/types/tests/test_scalar.py
@@ -11,19 +11,19 @@ def test_scalar():
 
 
 def test_ints():
-    assert Int.parse_value(2 ** 31 - 1) is not None
+    assert Int.parse_value(2**31 - 1) is not None
     assert Int.parse_value("2.0") is not None
-    assert Int.parse_value(2 ** 31) is None
+    assert Int.parse_value(2**31) is None
 
-    assert Int.parse_literal(IntValueNode(value=str(2 ** 31 - 1))) == 2 ** 31 - 1
-    assert Int.parse_literal(IntValueNode(value=str(2 ** 31))) is None
+    assert Int.parse_literal(IntValueNode(value=str(2**31 - 1))) == 2**31 - 1
+    assert Int.parse_literal(IntValueNode(value=str(2**31))) is None
 
-    assert Int.parse_value(-(2 ** 31)) is not None
-    assert Int.parse_value(-(2 ** 31) - 1) is None
+    assert Int.parse_value(-(2**31)) is not None
+    assert Int.parse_value(-(2**31) - 1) is None
 
-    assert BigInt.parse_value(2 ** 31) is not None
+    assert BigInt.parse_value(2**31) is not None
     assert BigInt.parse_value("2.0") is not None
-    assert BigInt.parse_value(-(2 ** 31) - 1) is not None
+    assert BigInt.parse_value(-(2**31) - 1) is not None
 
-    assert BigInt.parse_literal(IntValueNode(value=str(2 ** 31 - 1))) == 2 ** 31 - 1
-    assert BigInt.parse_literal(IntValueNode(value=str(2 ** 31))) == 2 ** 31
+    assert BigInt.parse_literal(IntValueNode(value=str(2**31 - 1))) == 2**31 - 1
+    assert BigInt.parse_literal(IntValueNode(value=str(2**31))) == 2**31
diff --git a/graphene/types/tests/test_scalars_serialization.py b/graphene/types/tests/test_scalars_serialization.py
index a95e8bd4..a91efe2c 100644
--- a/graphene/types/tests/test_scalars_serialization.py
+++ b/graphene/types/tests/test_scalars_serialization.py
@@ -38,7 +38,7 @@ def test_serializes_output_string():
     assert String.serialize(-1.1) == "-1.1"
     assert String.serialize(True) == "true"
     assert String.serialize(False) == "false"
-    assert String.serialize(u"\U0001F601") == u"\U0001F601"
+    assert String.serialize("\U0001F601") == "\U0001F601"
 
 
 def test_serializes_output_boolean():
diff --git a/setup.py b/setup.py
index 517fd7b3..b06702be 100644
--- a/setup.py
+++ b/setup.py
@@ -53,12 +53,12 @@ tests_require = [
     "snapshottest>=0.6,<1",
     "coveralls>=3.3,<4",
     "promise>=2.3,<3",
-    "mock>=4.0,<5",
-    "pytz==2021.3",
+    "mock>=4,<5",
+    "pytz==2022.1",
     "iso8601>=1,<2",
 ]
 
-dev_requires = ["black==19.10b0", "flake8>=3.7,<4"] + tests_require
+dev_requires = ["black==22.3.0", "flake8>=4,<5"] + tests_require
 
 setup(
     name="graphene",
diff --git a/tox.ini b/tox.ini
index 96a40546..a5ad6026 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,7 @@ commands =
 [testenv:mypy]
 basepython = python3.9
 deps =
-    mypy>=0.931,<1
+    mypy>=0.950,<1
 commands =
     mypy graphene