diff --git a/pkgs/development/python-modules/biliass/default.nix b/pkgs/development/python-modules/biliass/default.nix
index 617b87bc12f1..fe2cd731a1ce 100644
--- a/pkgs/development/python-modules/biliass/default.nix
+++ b/pkgs/development/python-modules/biliass/default.nix
@@ -7,12 +7,12 @@
 
 buildPythonPackage rec {
   pname = "biliass";
-  version = "1.3.5";
+  version = "1.3.4";
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-kgoQUX2l5YENEozcnfluwvcAO1ZSxlfHPVIa9ABW6IU=";
+    sha256 = "sha256-kktK+6rLwYhkG7LiTBlgBbiIN8apweg4l8pJSTjKQU4=";
   };
 
   propagatedBuildInputs = [ protobuf ];