diff --git a/pyproject.toml b/pyproject.toml
index ad626b9..8613c70 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ Repository = "https://github.com/carpedm20/fbchat/"
 
 [tool.flit.metadata.requires-extra]
 test = [
-    "pytest>=4.0,<6.0",
+    "pytest>=4.3,<6.0",
 ]
 docs = [
     "sphinx~=2.0",