1 files changed, 1 insertions, 1 deletions
diff --git a/requirements.txt b/requirements.txt
index 9bd3d0b..1386d73 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Jinja2
 md2gemini
-mistune
+mistune>=2.0.0a5,<3
 mistune-contrib
 Pygments