diff --git a/template/requirements/dev.in b/template/requirements/dev.in
index 1c747e4..53ddf47 100644
--- a/template/requirements/dev.in
+++ b/template/requirements/dev.in
@@ -5,6 +5,7 @@
 -r static.in
 -r test.in
 -r wheels.in
+copier
 jupyterlab
 pip-compile-multi
 pre-commit