diff --git a/requirements.txt b/requirements.txt
index 57653f3a..fd437f7d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,4 @@ scapy
 parsimonious
 asn1crypto
 dpkt
-pyhanko==0.20.1
+pyhanko==0.25.0