diff --git a/pkgs/development/python-modules/glyphslib/default.nix b/pkgs/development/python-modules/glyphslib/default.nix
index 536ea42979cc..de6103f6d73e 100644
--- a/pkgs/development/python-modules/glyphslib/default.nix
+++ b/pkgs/development/python-modules/glyphslib/default.nix
@@ -17,7 +17,7 @@
 
 buildPythonPackage rec {
   pname = "glyphslib";
-  version = "6.11.6";
+  version = "6.12.0";
 
   pyproject = true;
 
@@ -25,7 +25,7 @@ buildPythonPackage rec {
     owner = "googlefonts";
     repo = "glyphsLib";
     tag = "v${version}";
-    hash = "sha256-ZHF+q6L2XcYk5HRuRz1pgvfRAwY2GxLqyjIDY1ocsEQ=";
+    hash = "sha256-5Ae6oj3tbAvcKsSkDdIHhGi2I63sGDEByt00reTBQGQ=";
   };
 
   build-system = [ setuptools-scm ];