diff --git a/requirements.txt b/requirements.txt
index a9de957..738bfc0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 # Add here external Python modules dependencies, one per line. Module names
 # should match https://pypi.python.org/pypi names. For the full spec or
 # dependency lines, see https://pip.readthedocs.org/en/1.1/requirements.html
 
-breezy
+breezy < 3.3.0  # version 3.3.0 introduces Rust code, which requires rustc versions newer than available in Debian 11