diff --git a/pkgs/development/python-modules/bleak/default.nix b/pkgs/development/python-modules/bleak/default.nix
index d035e4133518..d159811efbcc 100644
--- a/pkgs/development/python-modules/bleak/default.nix
+++ b/pkgs/development/python-modules/bleak/default.nix
@@ -4,20 +4,18 @@
 
 buildPythonPackage rec {
   pname = "bleak";
-  version = "0.12.1";
+  version = "0.13.0";
 
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1va9138igcgbpsnzgr90qwprmhr9h8lryqslc22jxra4r56a502a";
+    sha256 = "1vnwk36qfws9amqrdaynf63dcj2gzxm0ns1l75hrczmd5j2ic1zb";
   };
 
   postPatch = ''
-    # bleak checks BlueZ's version with a call to `bluetoothctl -v` twice
-    substituteInPlace bleak/__init__.py \
-      --replace \"bluetoothctl\" \"${bluez}/bin/bluetoothctl\"
-    substituteInPlace bleak/backends/bluezdbus/client.py \
+    # bleak checks BlueZ's version with a call to `bluetoothctl --version`
+    substituteInPlace bleak/backends/bluezdbus/__init__.py \
       --replace \"bluetoothctl\" \"${bluez}/bin/bluetoothctl\"
   '';