diff --git a/python/pyproject.toml b/python/pyproject.toml
index fd4c97d4c..50613a9d3 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -37,7 +37,7 @@ requests-toolbelt = "^1.0.0"
 
 # Enabled via `langsmith_pyo3` extra: `pip install langsmith[langsmith_pyo3]`.
 langsmith-pyo3 = { version = "^0.1.0rc2", optional = true }
-zstandard = { version = ">=0.21.0", optional = true, python = ">=3.7" }
+zstandard = ">=0.21.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.3.1"