diff --git a/pyproject.toml b/pyproject.toml
index ddb1eaef..902320bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ test = [
   "pytest-cov==3.0.0",
   "pytest-xdist==3.1.0",
   "pytest-sugar==0.9.7",
-  "pytest-testmon==2.1.0",
+  "pytest-testmon==2.1.3",
   "pytest-benchmark==4.0.0",
   "pytest-codspeed==2.2.0",
 ]