diff --git a/requirements.txt b/requirements.txt
index 21adc40..98072f5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-ecdsa==0.13.2
+ecdsa==0.13.3
 esptool==2.6
 pyaes==1.6.1
 pyserial==3.4