diff --git a/pyproject.toml b/pyproject.toml
index d4cdaa52..63668198 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ classifiers = [
 requires-python = ">=3.7"
 
 dependencies = [
-  "pypdfium2>=4.0,<5",
+  "pypdfium2>=4.0,<4.30.1",
   "Pillow>=9.5.0",
   "pytz>=2023.3",
   "requests>=2.31.0",