diff --git a/pdf_helper/__manifest__.py b/pdf_helper/__manifest__.py
index f59b56b1cf..f565a3189b 100644
--- a/pdf_helper/__manifest__.py
+++ b/pdf_helper/__manifest__.py
@@ -15,5 +15,5 @@
     "depends": [
         "base",
     ],
-    "external_dependencies": {"python": ["pypdf"]},
+    "external_dependencies": {"python": ["pypdf>=3.1.0,<5.0"]},
 }
diff --git a/requirements.txt b/requirements.txt
index d72b73d55c..9b07849557 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,8 +4,8 @@ factur-x
 invoice2data
 ovh
 phonenumbers
-pypdf
 pypdf>=3.1.0
+pypdf>=3.1.0,<5.0
 pyyaml
 regex
 xmlschema