diff --git a/gobject-introspection.opam b/gobject-introspection.opam
index 6c119c2..df9401c 100644
--- a/gobject-introspection.opam
+++ b/gobject-introspection.opam
@@ -40,3 +40,6 @@ build: [
   ["dune" "install" "-p" name "--create-install-files" name]
 ]
 dev-repo: "git+https://github.com/cedlemo/OCaml-GObject-Introspection.git"
+pin-depends: [
+  ["ctypes.dev" "git+https://github.com/ocamllabs/ocaml-ctypes.git#673c98baddf77dae763139fe7dca47ed107cf412"]
+]
diff --git a/gobject-introspection.opam.template b/gobject-introspection.opam.template
new file mode 100644
index 0000000..11c2576
--- /dev/null
+++ b/gobject-introspection.opam.template
@@ -0,0 +1,3 @@
+pin-depends: [
+  ["ctypes.dev" "git+https://github.com/ocamllabs/ocaml-ctypes.git#673c98baddf77dae763139fe7dca47ed107cf412"]
+]