diff --git a/pkgs/development/python-modules/pynacl/default.nix b/pkgs/development/python-modules/pynacl/default.nix
index 5ce85acc194..dfce6652d03 100644
--- a/pkgs/development/python-modules/pynacl/default.nix
+++ b/pkgs/development/python-modules/pynacl/default.nix
@@ -5,7 +5,7 @@
 , libsodium
 , cffi
 , six
-, hypothesis_4
+, hypothesis
 }:
 
 buildPythonPackage rec {
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     sha256 = "01b56hxrbif3hx8l6rwz5kljrgvlbj7shmmd2rjh0hn7974a5sal";
   };
 
-  checkInputs = [ pytest hypothesis_4 ];
+  checkInputs = [ pytest hypothesis ];
   buildInputs = [ libsodium ];
   propagatedBuildInputs = [ cffi six ];