diff --git a/.travis-ci.sh b/.travis-ci.sh
index 9bdc212..5b5576c 100644
--- a/.travis-ci.sh
+++ b/.travis-ci.sh
@@ -4,7 +4,7 @@ sudo apt-get install ocaml ocaml-native-compilers camlp4-extra opam opam
export OPAMYES=1
opam init
-opam install oasis ocamlfind ocamlnet xmlm uri
+opam install oasis ocamlfind calendar xmlm uri
eval `opam config env`
./configure