diff --git a/pkgs/tools/text/mdbook-katex/default.nix b/pkgs/tools/text/mdbook-katex/default.nix
index c5cf1db068f7..a1314d2ccd13 100644
--- a/pkgs/tools/text/mdbook-katex/default.nix
+++ b/pkgs/tools/text/mdbook-katex/default.nix
@@ -1,18 +1,15 @@
-{ lib, stdenv, fetchCrate, rustPlatform, openssl, CoreServices }:
+{ lib, rustPlatform, fetchCrate, stdenv, CoreServices }:
 
 rustPlatform.buildRustPackage rec {
   pname = "mdbook-katex";
-  version = "0.5.0";
+  version = "0.5.1";
 
   src = fetchCrate {
     inherit pname version;
-    hash = "sha256-6gZTJrjr3cO7f6XBrQrBKe62UsnPxGo1eXX/+ICdJfk=";
+    hash = "sha256-RDNZ6+d+UbiQ/Eb2+YbhPyGVcM8079UFsnNvch/1oAs=";
   };
 
-  cargoHash = "sha256-KHC37LNnc789anxJBADgj97tw5TwR/5ksxP3X/9pHlo=";
-
-  OPENSSL_DIR = "${lib.getDev openssl}";
-  OPENSSL_LIB_DIR = "${lib.getLib openssl}/lib";
+  cargoHash = "sha256-An2mQ4kWGF3qk2v9VeQh700n7n/+3ShPqMfCnZmiIuc=";
 
   buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];