diff --git a/pyproject.toml b/pyproject.toml
index d2ca3dd..ab379c1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ rich = "^13.5"
 loguru = "^0.7"
 pydantic-settings = "^2.0, <2.9.0"
 pydantic = "^2.3"
-pyinstrument = { version = "^4.5", optional = true }
+pyinstrument = { version = ">=4.5,<6.0", optional = true }
 toml = "^0.10"
 tomlkit = ">=0.12,<0.14"
 jinja2 = "^3.1.3"