diff --git a/arch.sh b/arch.sh
index f793c67..799fb32 100644
--- a/arch.sh
+++ b/arch.sh
@@ -370,7 +370,8 @@ main() {
   echo | opam init
   fish -c "yes | opam init"
   opam install -y \
-    utop ocaml-lsp-server ocamlformat ocamlformat-rpc menhir pprint sexplib
+    utop ocaml-lsp-server ocamlformat ocamlformat-rpc menhir pprint sexplib \
+    ppx_sexp_conv
   wget -q ${repo}/dotfiles/.ocamlformat -O "$HOME"/.ocamlformat
   # Add Opam packages from OCaml
   mkdir -p "$HOME"/.opam/default/bin
diff --git a/arch_wsl.sh b/arch_wsl.sh
index 794b5fa..ae52854 100644
--- a/arch_wsl.sh
+++ b/arch_wsl.sh
@@ -172,7 +172,8 @@ main() {
   echo | opam init
   fish -c "yes | opam init"
   opam install -y \
-    utop ocaml-lsp-server ocamlformat ocamlformat-rpc menhir pprint sexplib
+    utop ocaml-lsp-server ocamlformat ocamlformat-rpc menhir pprint sexplib \
+    ppx_sexp_conv
   wget -q ${repo}/dotfiles/.ocamlformat -O "$HOME"/.ocamlformat
   # Add Opam packages from OCaml
   mkdir -p "$HOME"/.opam/default/bin