diff --git a/pyproject.toml b/pyproject.toml
index 56325be13..8c7299f28 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -290,7 +290,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "check-manifest==0.49",
-    "dirty-equals==0.6", # We pin to an old doc8 to avoid version conflicts with sphinx_toolbox. When we bump this, we can remove doc8.ini.
+    "dirty-equals==0.7.1.post0", # We pin to an old doc8 to avoid version conflicts with sphinx_toolbox. When we bump this, we can remove doc8.ini.
     "doc8==0.11.2",
     "docker==6.1.3",
     "dodgy==0.2.1",