diff --git a/setup.cfg b/setup.cfg
index f895c681..b62bc755 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -53,7 +53,7 @@ tests =
     ; A framework for linting & static analysis
     flake8>=4.0,<5.1
     ; Avoid shadowing Python built-in names
-    flake8-builtins>=1.5,<1.6
+    flake8-builtins>=1.5,<2.1
     ; Ensure docstrings are formatted well
     flake8-docstrings>=1.5,<1.7
     ; Allow use of ReST in docstrings