diff --git a/pkgs/tools/admin/sewer/default.nix b/pkgs/tools/admin/sewer/default.nix
index 5410d0c833d..59edaff5f94 100644
--- a/pkgs/tools/admin/sewer/default.nix
+++ b/pkgs/tools/admin/sewer/default.nix
@@ -2,20 +2,15 @@
 
 python3Packages.buildPythonApplication rec {
   pname = "sewer";
-  version = "0.6.0";
+  version = "0.7.0";
 
   src = python3Packages.fetchPypi {
     inherit pname version;
-    sha256 = "180slmc2zk4mvjqp25ks0j8kd63ai4y77ds5icm7qd7av865rryp";
+    sha256 = "16j4npqj3fdj3g2z7nqb0cvvxd85xk20g9c43f3q8a1k5psf1fmq";
   };
 
   propagatedBuildInputs = with python3Packages; [ pyopenssl requests tldextract ];
 
-  postPatch = ''
-    # The README has non-ascii characters which makes setup.py crash.
-    sed -i 's/[\d128-\d255]//g' README.md
-  '';
-
   meta = with stdenv.lib; {
     homepage = https://github.com/komuw/sewer;
     description = "ACME client";