diff --git a/pyproject.toml b/pyproject.toml
index 5f0b64b..20a4950 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ description = "A CLI tool for generating pathogen-specific barcodes for Freyja."
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-    "dendropy>=4.5.2",
+    "dendropy>=5.0.8",
     "ete4>=4.3.0",
     "pathlib>=1.0.1",
     "rich-click>=1.6.0",