diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 16ff15c..176e6bc 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -36,7 +36,7 @@ repos:
   hooks:
   - id: toml-sort-fix
 - repo: https://github.com/abravalheri/validate-pyproject
-  rev: 0.26
+  rev: '0.26'
   hooks:
   - id: validate-pyproject
 - repo: https://github.com/executablebooks/mdformat