diff --git a/pkgs/development/python-modules/openslide/default.nix b/pkgs/development/python-modules/openslide/default.nix
index 12eba245ff24..fe9971fab8e6 100644
--- a/pkgs/development/python-modules/openslide/default.nix
+++ b/pkgs/development/python-modules/openslide/default.nix
@@ -11,7 +11,7 @@
 
 buildPythonPackage rec {
   pname = "openslide";
-  version = "1.4.2";
+  version = "1.4.3";
   pyproject = true;
 
   disabled = pythonOlder "3.9";
@@ -20,7 +20,7 @@ buildPythonPackage rec {
     owner = "openslide";
     repo = "openslide-python";
     tag = "v${version}";
-    hash = "sha256-iI92lsW+hshMxl2rtc3/iq0LmQBuvpwqpqJXMXcCiLc=";
+    hash = "sha256-v8JrZdDwZPtnWYOmvJXbq22k6/MQqMzWweD86Eof0e4=";
   };
 
   postPatch = ''