diff --git a/Makefile b/Makefile
index f723001..24b7eaf 100644
--- a/Makefile
+++ b/Makefile
@@ -49,4 +49,4 @@ $(opam_file): dune-project ## Update the package dependencies when new deps are
 
 init: ## Create a local opam switch and setups githooks
 	git config core.hooksPath .githooks
-	opam switch create . --deps-only --with-test
+	opam switch create . 4.12.1 --deps-only --with-test