diff --git a/src/copier_templates_extensions/__init__.py b/src/copier_templates_extensions/__init__.py
new file mode 100644
index 0000000..5a86687
--- /dev/null
+++ b/src/copier_templates_extensions/__init__.py
@@ -0,0 +1,18 @@
+"""Deprecated. Import from `copier-template-extensions` instead."""
+
+# YORE: Bump 1: Remove file.
+
+import warnings
+
+from copier_template_extensions import ContextHook, TemplateExtensionLoader
+
+__all__: list[str] = ["ContextHook", "TemplateExtensionLoader"]
+
+warnings.warn(
+    "`copier-templates-extensions` is renamed `copier-template-extensions`. "
+    "Please use the new name, and replace every occurrence of "
+    "`copier-templates-extensions` and `copier_templates_extensions` in your template with "
+    "`copier-template-extensions` and `copier_template_extensions` respectively.",
+    DeprecationWarning,
+    stacklevel=2,
+)