diff --git a/poetry.lock b/poetry.lock
index 74db166..9f03fd6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1703,4 +1703,4 @@ testing = ["big-O", "flake8 (<5)", "jaraco.functools", "jaraco.itertools", "more
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.7,<4.0"
-content-hash = "24441ac10a218392485a3d20790b60982dca4f1b1706331b596d8cf810e3beb3"
+content-hash = "5b13c11a0943bc97af2cadc92e41c4644657deee119436c3e0ae5e18fa0f3931"
diff --git a/pyproject.toml b/pyproject.toml
index e350996..6272187 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ click = ">=8.0.3"
 pysam = ">=0.19.0"
 cyvcf2 = ">=0.30.14"
 matplotlib = ">=3.5.1"
-Pgenlib = ">=0.90.1"
+pgenlib = ">=0.90.1"
 
 [tool.poetry.group.docs.dependencies]
 Sphinx = ">=4.3.2"