diff --git a/setup.cfg b/setup.cfg
index adaca53..36408bc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -35,7 +35,7 @@ packages = find:
 install_requires =
     ecdsa != 0.15
     rsa >=4.0, <5.0, !=4.4, !=4.1.1
-    pyasn1 >=0.4.1
+    pyasn1 >=0.5.0
 
 [options.extras_require]
 test =