diff --git a/pyproject.toml b/pyproject.toml
index f702463..aec9132 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,8 +8,7 @@ build-backend = "setuptools.build_meta"
 
 [tool.black]
 line-length = 80
-target-version = ['py36', 'py37']
-skip-string-normalization = true
+target-version = ["py36", "py37", "py38"]
 include = '\.pyi?$'
 
 [tool.towncrier]