diff --git a/dune-project b/dune-project
index 55b8872..2d60daa 100644
--- a/dune-project
+++ b/dune-project
@@ -24,6 +24,7 @@
   base64
   cdp
   cmdliner
+  conf-openssl
   piaf
   httpun-eio
   httpun-ws-eio
diff --git a/osnap.opam b/osnap.opam
index 15e2cd9..d953bc0 100644
--- a/osnap.opam
+++ b/osnap.opam
@@ -14,6 +14,7 @@ depends: [
   "base64"
   "cdp"
   "cmdliner"
+  "conf-openssl"
   "piaf"
   "httpun-eio"
   "httpun-ws-eio"