diff --git a/setup.py b/setup.py
index 6807b63ff..ffc5067a0 100644
--- a/setup.py
+++ b/setup.py
@@ -106,7 +106,7 @@ setup(
             "hypothesis>=5.8,<7",
             "parver>=0.1,<2.0",
             "pdoc>=4.0.0",
-            "pyinstaller==5.4",
+            "pyinstaller==5.4.1",
             "pytest-asyncio>=0.17,<0.20",
             "pytest-cov>=2.7.1,<3.1",
             "pytest-timeout>=1.3.3,<2.2",