diff --git a/pyproject.toml b/pyproject.toml
index 76bd76e1..2e4635bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ test = [
     "pytest-cases ==3.9.1",
     "pytest-custom_exit_code ==0.3.0",
     "pytest-cov ==6.3.0",  # Uses: coverage[toml] >=7.5
-    "pytest-doctestplus ==1.4.0",
+    "pytest-doctestplus ==1.5.0",
     "pytest-env ==1.1.5",
 ]