diff --git a/tools/requirements.txt b/tools/requirements.txt
index eebb732..da19045 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -1,5 +1,5 @@
 ecdsa
-fido2
+fido2==0.7.3
 intelhex
 pyserial
 solo-python