diff --git a/requirements.txt b/requirements.txt
index 9e18ddb..41c1b65 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ goocalendar
 emailvalid
 simpleeval
 pyflakes
-PyPDF2
+PyPDF2==2.12.1
 cached-property
 wrapt
 passlib