diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9a2e475..dfadb8c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,3 @@
 pytest>=8.3.5,<9.0
-pytest-mock>=3.14.0,4.0
+pytest-mock>=3.14.0,<4.0
 ruff>=0.11.1,<0.20