diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c8279f28..7793c1d6 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -38,7 +38,7 @@ repos:
   - id: isort
 
 - repo: https://github.com/psf/black
-  rev: 21.12b0
+  rev: 22.1.0
   hooks:
   - id: black
 
diff --git a/cibuildwheel/util.py b/cibuildwheel/util.py
index 516804d2..77af409d 100644
--- a/cibuildwheel/util.py
+++ b/cibuildwheel/util.py
@@ -141,7 +141,7 @@ def format_safe(template: str, **kwargs: Any) -> str:
 
     for key, value in kwargs.items():
         find_pattern = re.compile(
-            fr"""
+            rf"""
                 (?<!\#)  # don't match if preceded by a hash
                 {{  # literal open curly bracket
                 {re.escape(key)}  # the field name