diff --git a/pkgs/development/python-modules/pycaption/default.nix b/pkgs/development/python-modules/pycaption/default.nix
index d4ed6088409..468011e2a80 100644
--- a/pkgs/development/python-modules/pycaption/default.nix
+++ b/pkgs/development/python-modules/pycaption/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
   prePatch = ''
     substituteInPlace setup.py \
       --replace 'beautifulsoup4>=4.2.1,<4.5.0' \
-                'beautifulsoup4>=4.2.1,<=4.6.0'
+                'beautifulsoup4>=4.2.1,<=4.6.3'
   '';
 
   # don't require enum34 on python >= 3.4