diff --git a/pyproject.toml b/pyproject.toml
index 761a3309..4ac23ef8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,6 +38,7 @@ dependencies = [
     "tenacity",
     "tiktoken",
     "xlsxwriter>=3.1.0",
+    "pycryptodome",
 ]
 
 [project.optional-dependencies]