diff --git a/pyproject.toml b/pyproject.toml
index b0f3e1fc..23874696 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ classifiers=[
     "Programming Language :: Python :: 3.11",
 ]
 dependencies = [
-    "e2xcore>=0.0.3",
+    "e2xcore>=0.0.4",
     "e2xauthoring>=0.2.0.dev3",
     "pandas"
 ]