diff --git a/dune-project b/dune-project
index d7e0340..1a7e084 100644
--- a/dune-project
+++ b/dune-project
@@ -5,4 +5,9 @@
  (name talircd)
  (depends
    ocaml
-   dune))
+   dune
+   (lwt (= 5.7.0))
+   (ppx_expect (= v0.16.0))
+   (ppx_deriving (= 5.2.1))
+   (fmt (= 0.9.0))
+   (ptime (= 1.1.0))))
diff --git a/talircd.opam b/talircd.opam
index 9fc01a4..56f05d1 100644
--- a/talircd.opam
+++ b/talircd.opam
@@ -3,6 +3,11 @@ opam-version: "2.0"
 depends: [
   "ocaml"
   "dune" {>= "3.8"}
+  "lwt" {= "5.7.0"}
+  "ppx_expect" {= "v0.16.0"}
+  "ppx_deriving" {= "5.2.1"}
+  "fmt" {= "0.9.0"}
+  "ptime" {= "1.1.0"}
   "odoc" {with-doc}
 ]
 build: [