diff --git a/pyproject.toml b/pyproject.toml
index c81b999da3..eaa3b59e36 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 name = "IfcOpenShell"
 version = "0.0.0"
 dependencies = [
-    "black==26.1.0",
+    "black==26.3.0",
     "ruff==0.15.5",
     "poethepoet",
     "gersemi==0.26.0",