diff --git a/CHANGES b/CHANGES
index 8a40139..725ea01 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+0.5.6 (2018-09-12)
+=====
+* Switch to the dune build system.
+
 0.5.5 (2017-10-13)
 =====
 * Make sure that LDFLAGS is honored during build.
diff --git a/Makefile b/Makefile
index 8a7eab1..18094b6 100644
--- a/Makefile
+++ b/Makefile
@@ -17,3 +17,20 @@ clean:
 
 all-supported-ocaml-versions:
 	dune build @default @runtest --workspace dune-workspace.dev
+
+install-dev:
+	opam install -y opam-query opam-publish tls
+
+VERSION      := $$(opam query --version)
+NAME_VERSION := $$(opam query --name-version)
+ARCHIVE      := $$(opam query --archive)
+
+release:
+	git tag -a v$(VERSION) -m "Version $(VERSION)."
+	git push origin v$(VERSION)
+	opam publish prepare $(NAME_VERSION) $(ARCHIVE)
+	cp descr $(NAME_VERSION)
+	grep -Ev '^(name|version):' opam >$(NAME_VERSION)/opam
+	opam publish submit $(NAME_VERSION)
+	rm -rf $(NAME_VERSION)
+
diff --git a/README.md b/README.md
index e34401b..416a0d5 100644
--- a/README.md
+++ b/README.md
@@ -7,28 +7,13 @@ OCaml-SSL - OCaml bindings for the libssl
 
 Copyright (c) 2003-2015 the Savonet Team.
 
-Dependencies
-------------
-
-To build this library you need to have OCaml 3.08 (and the
-[bytes](https://github.com/chambart/ocaml-bytes) module if your OCaml is older
-than 4.03) and the [openssl](https://www.openssl.org/) library.
-
 Installation
 ------------
 
-To compile the program type:
-
-```
-./configure
-make
-```
-
-(you can set specific build options with the configure script, see
-`./configure --help`) then, to install it, type as root:
+`ocaml-ssl` can be installed via [OPAM](https://opam.ocaml.org):
 
 ```
-make install
+opam install ssl
 ```
 
 Is this library thread-safe?
diff --git a/README.win32 b/README.win32
deleted file mode 100644
index 30539ac..0000000
--- a/README.win32
+++ /dev/null
@@ -1,36 +0,0 @@
-OCaml-SSL - OCaml bindings for the libssl
-=========================================
-
-Windows Installation Instructions
-=================================
-
-Author: David Allsopp <david.allsopp@metastack.com>
-
-Note - these instructions are only for the MinGW port of OCaml (tested with
-3.12.0 and OpenSSL 1.0.0d).
-
-
-Dependencies
-============
-
-These instructions allow compilation of OpenSSL from sources using the MinGW
-compiler instead of Cygwin's. You will need an installation of Cygwin with at
-least the core GCC suite (with MinGW compiler), GNU Make and Perl
-
-Extract the OpenSSL sources from the tarball and from that directory run:
-
-perl Configure mingw shared --prefix=C:/ocamlmgw
-make
-make install
-
-This will install an OCaml compiled OpenSSL library to C:\ocamlmgw
-
-
-Installation
-============
-
-To compile the OCaml-SSL, run:
-
-./configure CC='gcc -mno-cygwin' LDFLAGS=-LC:/ocamlmgw/lib CFLAGS=-IC:/ocamlmgw/include
-make
-make install
diff --git a/descr b/descr
new file mode 100644
index 0000000..f703707
--- /dev/null
+++ b/descr
@@ -0,0 +1 @@
+Bindings for OpenSSL
diff --git a/opam b/opam
new file mode 120000
index 0000000..8f66d15
--- /dev/null
+++ b/opam
@@ -0,0 +1 @@
+ssl.opam
\ No newline at end of file
diff --git a/ssl.opam b/ssl.opam
index dfc22de..8d1cb9b 100644
--- a/ssl.opam
+++ b/ssl.opam
@@ -1,4 +1,6 @@
 opam-version: "1.2"
+name: "ssl"
+version: "0.5.6"
 maintainer: "Christopher Zimmermann <christopher@gmerlin.de>"
             author: "Samuel Mimram <samuel.mimram@ens-lyon.org>"
 homepage: "https://github.com/savonet/ocaml-ssl"