diff -Naur a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml	2021-02-02 17:11:47.542490469 +0800
+++ b/pyproject.toml	2021-02-02 17:13:04.363419475 +0800
@@ -1,7 +1,7 @@
 [build-system]
 requires = [
     "setuptools >= 40.0.4",
-    "setuptools_scm >= 2.0.0, <4",
+    "setuptools_scm >= 2.0.0, <6",
     "wheel >= 0.29.0",
 ]
 build-backend = 'setuptools.build_meta'
diff -Naur a/setup.py b/setup.py
--- a/setup.py	2021-02-02 17:11:47.542490469 +0800
+++ b/setup.py	2021-02-02 17:13:46.093922146 +0800
@@ -35,7 +35,7 @@
         "toml >=0.9.4",
         "filelock >= 3.0.0, <4",
     ],
-    setup_requires=["setuptools-scm>2, <4"],  # readthedocs needs it
+    setup_requires=["setuptools-scm>2, <6"],  # readthedocs needs it
     extras_require={
         "testing": [
             "pytest >= 3.0.0, <4",