diff --git a/setup.py b/setup.py
index 2fa2e5dc3..226ac5755 100644
--- a/setup.py
+++ b/setup.py
@@ -108,11 +108,11 @@ setup(
             "hypothesis>=5.8,<7",
             "parver>=0.1,<2.0",
             "pdoc>=4.0.0",
-            "pyinstaller==5.6",
+            "pyinstaller==5.6.1",
             "pytest-asyncio>=0.17,<0.21",
             "pytest-cov>=2.7.1,<4.1",
             "pytest-timeout>=1.3.3,<2.2",
-            "pytest-xdist>=2.1.0,<3",
+            "pytest-xdist>=2.1.0,<3.1",
             "pytest>=6.1.0,<8",
             "requests>=2.9.1,<3",
             "tox>=3.5,<4",