diff --git a/feat.opam b/feat.opam
index 570f53fa1b66e0d8ebc2a37237e25afadae7e940..dbec49e0e38f328028448485f6c0e745726f8cc9 100644
--- a/feat.opam
+++ b/feat.opam
@@ -14,6 +14,7 @@ depends: [
   "ocaml" { >= "4.03" }
   "dune" { >= "1.3" }
   "zarith"
+  "seq"
   "fix" { >= "20181206" }
 ]
 synopsis: "Facilities for enumerating and sampling algebraic data types"
diff --git a/src/dune b/src/dune
index 19e1d4f7cec639cdc8fd2e82fee2b9560bde9dbb..90a5a6cc3def11b034915cb5828e6439c8dd4064 100644
--- a/src/dune
+++ b/src/dune
@@ -3,5 +3,5 @@
   (public_name feat)
   (synopsis "Facilities for enumerating and sampling algebraic data types")
   (flags "-w" "A-44")
-  (libraries zarith fix)
+  (libraries seq zarith fix)
 )