diff --git a/requirements.txt b/requirements.txt
index d60d206..24016a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-bibtexparser==2.0.0b4
+bibtexparser==2.0.0b9
 click==8.4.2
 colorama==0.4.6
 et-xmlfile==1.1.0