diff --git a/.travis.yml b/.travis.yml
index bead9e7eca..59a3b99e14 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: c
-script: bash -ex .travis-ci.sh
+install: wget https://raw.githubusercontent.com/ocaml/ocaml-travisci-skeleton/master/.travis-opam.sh
+script: bash -ex .travis-opam.sh
 env:
-  - OCAML_VERSION=4.02.0 OPAM_VERSION=1.2.0
-  - OCAML_VERSION=4.01.0 OPAM_VERSION=1.2.0
+  - PACKAGE="cohttp" OCAML_VERSION=4.01   DEPOPTS="async lwt js_of_ocaml" POST_INSTALL_HOOK="opam install github cowabloga" 
+  - PACKAGE="cohttp" OCAML_VERSION=latest DEPOPTS="async lwt js_of_ocaml" POST_INSTALL_HOOK="opam install github cowabloga"
diff --git a/CHANGES b/CHANGES
index a0c36f747c..c06107186f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,12 @@
+0.15.1 (2015-01-10):
+* Lwt 2.4.7 renamed `blit_bytes_string` to `blit_to_bytes`, so depend
+  on the newer API now. (#230)
+* Use `cmdliner` in all of the Lwt client and server binaries.  This gives
+  `cohttp-lwt-server` a nice Unix-like command-line interface now that
+  can be viewed with the `--help` option. (#218 via Runhang Li)
+* Improve `oasis` constraints and regenerate `opam` file (#229 via
+  Christophe Troestler).
+
 0.15.0 (2014-12-24):
 
 Compatibility breaking interface changes:
diff --git a/_oasis b/_oasis
index 1a6f8486b9..d99d765a09 100644
--- a/_oasis
+++ b/_oasis
@@ -1,6 +1,6 @@
 OASISFormat: 0.3
 Name:        cohttp
-Version:     0.15.0
+Version:     0.15.1
 Synopsis:    HTTP library for Lwt, Async, JavaScript and Mirage
 Description: CoHTTP is an OCaml library for creating HTTP clients and
   daemons.  It has a portable HTTP parser.  Optional dependencies
diff --git a/lib/META b/lib/META
index 9af1a5049a..0b73a814e5 100644
--- a/lib/META
+++ b/lib/META
@@ -1,6 +1,6 @@
 # OASIS_START
-# DO NOT EDIT (digest: 58f3ba980c68f36d754812ac1d1ae41c)
-version = "0.15.0"
+# DO NOT EDIT (digest: 9e9feb768a18f46865e56b0bd9281958)
+version = "0.15.1"
 description = "HTTP library for Lwt, Async, JavaScript and Mirage"
 requires =
 "re.emacs stringext uri uri.services fieldslib sexplib bytes base64"
@@ -10,7 +10,7 @@ archive(native) = "cohttp.cmxa"
 archive(native, plugin) = "cohttp.cmxs"
 exists_if = "cohttp.cma"
 package "lwt-core" (
- version = "0.15.0"
+ version = "0.15.1"
  description = "HTTP library for Lwt, Async, JavaScript and Mirage"
  requires = "lwt uri cohttp"
  archive(byte) = "cohttp_lwt.cma"
@@ -21,7 +21,7 @@ package "lwt-core" (
 )
 
 package "lwt" (
- version = "0.15.0"
+ version = "0.15.1"
  description = "HTTP library for Lwt, Async, JavaScript and Mirage"
  requires = "cohttp.lwt-core unix lwt.unix conduit.lwt-unix"
  archive(byte) = "cohttp_lwt_unix.cma"
@@ -32,7 +32,7 @@ package "lwt" (
 )
 
 package "js" (
- version = "0.15.0"
+ version = "0.15.1"
  description = "HTTP library for Lwt, Async, JavaScript and Mirage"
  requires = "cohttp.lwt-core js_of_ocaml"
  archive(byte) = "cohttp_lwt_xhr.cma"
@@ -43,7 +43,7 @@ package "js" (
 )
 
 package "async" (
- version = "0.15.0"
+ version = "0.15.1"
  description = "HTTP library for Lwt, Async, JavaScript and Mirage"
  requires = "uri cohttp threads async conduit.async"
  archive(byte) = "cohttp_async.cma"
diff --git a/opam b/opam
index 8dfcf77fbe..13d2891086 100644
--- a/opam
+++ b/opam
@@ -2,6 +2,7 @@ opam-version: "1.2"
 
 name: "cohttp"
 maintainer: "anil@recoil.org"
+version: "0.15.1"
 authors: [ "Anil Madhavapeddy"
            "Stefano Zacchiroli"
            "David Sheets"
@@ -37,7 +38,7 @@ depends: [
   "sexplib" {>= "109.53.00"}
   "conduit" {>= "0.7.0"}
   "stringext"
-  "base64" {>= "2.0.0"}
+  "base64" {>="2.0.0"}
   "ounit" {test}
 ]
 build-doc: ["ocaml" "setup.ml" "-doc"]
@@ -56,7 +57,7 @@ depopts: [
 
 conflicts: [
   "async" {<"109.15.00"}
-  "lwt" {<"2.4.3"}
+  "lwt" {<"2.4.7"}
 ]
 
 available: [ocaml-version >= "4.01.0"]
diff --git a/setup.ml b/setup.ml
index f1d3249c3a..2d61cb03cf 100644
--- a/setup.ml
+++ b/setup.ml
@@ -1,7 +1,7 @@
 (* setup.ml generated for the first time by OASIS v0.4.5 *)
 
 (* OASIS_START *)
-(* DO NOT EDIT (digest: 0c6b8beb5ec6ae656e105109382e98bb) *)
+(* DO NOT EDIT (digest: b71dbfcdc32b92c942e7b5f2bc937595) *)
 (*
    Regenerated by OASIS v0.4.5
    Visit http://oasis.forge.ocamlcore.org for more information and
@@ -6975,7 +6975,7 @@ let setup_t =
           alpha_features = [];
           beta_features = [];
           name = "cohttp";
-          version = "0.15.0";
+          version = "0.15.1";
           license =
             OASISLicense.DEP5License
               (OASISLicense.DEP5Unit
@@ -8396,7 +8396,7 @@ let setup_t =
        };
      oasis_fn = Some "_oasis";
      oasis_version = "0.4.5";
-     oasis_digest = Some "2 ~\001Sò/ø\020'\031\152<\012x4";
+     oasis_digest = Some "­_\020Üuà-YúÝïê6`þh";
      oasis_exec = None;
      oasis_setup_args = [];
      setup_update = false