diff --git a/pkgs/development/python-modules/bidsschematools/default.nix b/pkgs/development/python-modules/bidsschematools/default.nix
index 2f4d7e2facf7..3585e372d7e5 100644
--- a/pkgs/development/python-modules/bidsschematools/default.nix
+++ b/pkgs/development/python-modules/bidsschematools/default.nix
@@ -10,14 +10,14 @@
 
 buildPythonPackage rec {
   pname = "bidsschematools";
-  version = "1.1.6";
+  version = "1.2.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "bids-standard";
     repo = "bids-specification";
     tag = "schema-${version}";
-    hash = "sha256-HMGhEEnmr0BwkcRcysmu9SgTME4BhrwcAAnRt4qF7eI=";
+    hash = "sha256-BK31NSq4WiQiM/GLxaL8bmce25RRS6ZJvOW7PhS6ByQ=";
   };
 
   sourceRoot = "${src.name}/tools/schemacode";