diff --git a/awkward-cpp/pyproject.toml b/awkward-cpp/pyproject.toml
index 9c5637b5d3..43411b9299 100644
--- a/awkward-cpp/pyproject.toml
+++ b/awkward-cpp/pyproject.toml
@@ -7,7 +7,7 @@ build-backend = "scikit_build_core.build"
 
 [project]
 name = "awkward_cpp"
-version = "37"
+version = "38"
 dependencies = [
     "numpy>=1.18.0",
     "importlib_resources;python_version < \"3.9\""
diff --git a/pyproject.toml b/pyproject.toml
index b985ae05cd..c90871835e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ classifiers = [
     "Topic :: Utilities",
 ]
 dependencies = [
-    "awkward_cpp==37",
+    "awkward_cpp==38",
     "importlib_metadata>=4.13.0;python_version < \"3.12\"",
     "numpy>=1.18.0",
     "packaging",