diff --git a/scripts/install_build_deps.sh b/scripts/install_build_deps.sh
index 087f0be3c..cb93054f0 100755
--- a/scripts/install_build_deps.sh
+++ b/scripts/install_build_deps.sh
@@ -50,6 +50,7 @@ if "$pin"; then
     opam pin --yes add --no-action --dev-repo ocp-ocamlres
     opam pin --yes add --no-action --dev-repo ocplib-json-typed
     opam pin --yes add --no-action --dev-repo ocplib-resto
+    opam pin --yes add --no-action --dev-repo cohttp
     opam pin add typerex-build --dev --no-action
     ## Force opam to take account of the new `tezos-deps.opam`
     opam pin --yes remove tezos-deps