diff --git a/CHANGES.md b/CHANGES.md
new file mode 100644
index 0000000..00c0d6e
--- /dev/null
+++ b/CHANGES.md
@@ -0,0 +1,7 @@
+### 0.1.1 (2018-06-14)
+
+* Fix compatibility with Lwt 4.0.0
+
+### 0.1.0 (2018-01-20)
+
+* Initial version (experimental)
diff --git a/doc/doc.odocl b/doc/doc.odocl
new file mode 100644
index 0000000..e69de29
diff --git a/ezpostgresql.opam b/ezpostgresql.opam
index 0a1f3f4..3cf1dfe 100644
--- a/ezpostgresql.opam
+++ b/ezpostgresql.opam
@@ -1,13 +1,16 @@
 opam-version: "2.0"
 name: "ezpostgresql"
-version: "0.1.0"
 maintainer: "Bobby Priambodo <bobby.priambodo@gmail.com>"
 authors: ["Bobby Priambodo <bobby.priambodo@gmail.com>"]
 homepage: "https://github.com/bobbypriambodo/ezpostgresql"
 bug-reports: "https://github.com/bobbypriambodo/ezpostgresql/issues"
 dev-repo: "git+https://github.com/bobbypriambodo/ezpostgresql"
+doc: "https://bobbypriambodo.github.io/ezpostgresql/"
 license: ["MIT"]
-build: [["jbuilder" "build" "-p" name "-j" jobs]]
+build: [
+  ["jbuilder" "subst"] {pinned}
+  ["jbuilder" "build" "-p" name "-j" jobs]
+]
 depends: [
   "jbuilder"          {build & >= "1.0+beta14"}
   "lwt"               {>= "3.0"}
diff --git a/pkg/pkg.ml b/pkg/pkg.ml
new file mode 100644
index 0000000..1a04c2b
--- /dev/null
+++ b/pkg/pkg.ml
@@ -0,0 +1,2 @@
+#use "topfind"
+#require "topkg-jbuilder.auto"