diff --git a/pkgs/tools/text/mdbook-katex/default.nix b/pkgs/tools/text/mdbook-katex/default.nix
index 6d80babb2f95..c269287ff8db 100644
--- a/pkgs/tools/text/mdbook-katex/default.nix
+++ b/pkgs/tools/text/mdbook-katex/default.nix
@@ -2,14 +2,14 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "mdbook-katex";
-  version = "0.2.17";
+  version = "0.2.21";
 
   src = fetchCrate {
     inherit pname version;
-    sha256 = "sha256-rJzZVZn8CJOIcSVLCLv6tWox0MRdxNBMUKo1fij1ogc=";
+    hash = "sha256-cJRO/HHxujSL5YTM4e+HMRsItlEe1OYn8rSqnwcqbgU=";
   };
 
-  cargoHash = "sha256-aSFXTeP5wDshdrrJ+eJCTmLuTlxCuM+5irUr0iW4tAY=";
+  cargoHash = "sha256-FPoSye+wD/MPR5fCrQ212W4iYoJLWOFXgeStcg0GEHw=";
 
   OPENSSL_DIR = "${lib.getDev openssl}";
   OPENSSL_LIB_DIR = "${lib.getLib openssl}/lib";