diff --git a/CHANGES.md b/CHANGES.md
index c0a933c..29ba02a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,16 @@
+v4.4.0 2023-09-25
+-----------------
+
+* **breaking change** Fix parsing & printing of IPv6 addresses in the host part of an uri
+
+  If we follow the RFC3986 correctly, IPv6 must be surrounded by '[' and ']'. Old versions
+  of `ocaml-uri` escaped these characters. The new version interprets these characters to
+  recognize an IPv6 address.
+
+  Users should take note of this change in behaviour, which fixes a number of bugs in HTTP
+  requests. (@anmonteiro, review by several maintainers, #169)
+* Upgrade tests to `ounit2` (@Alessandro-Barbieri, #161)
+
 v4.3.0 2023-04-19
 -----------------
 
diff --git a/uri-bench.opam b/uri-bench.opam
index 254bc7e..8306a99 100644
--- a/uri-bench.opam
+++ b/uri-bench.opam
@@ -12,14 +12,14 @@ description: """
 This is a benchmarking package for the OCaml implementation of the [RFC3986](http://tools.ietf.org/html/rfc3986) specification for parsing URI or URLs.
 """
 depends: [
-  "ocaml" {>= "4.04.0"}
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.2.0"}
   "uri" {= version}
-  "core_bench" {with-test & >= "v0.14.0"}
-  "core_unix" {with-test & >= "v0.14.0"}
+  "core_bench" {>= "v0.14.0"}
+  "core_unix" {>= "v0.14.0"}
 ]
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   ["dune" "build" "-p" name "-j" jobs]
   ["dune" "runtest" "-p" name "-j" jobs] {with-test}
 ]
diff --git a/uri-re.opam b/uri-re.opam
index 3d34e3e..e43899a 100644
--- a/uri-re.opam
+++ b/uri-re.opam
@@ -13,16 +13,18 @@ This is an OCaml implementation of the [RFC3986](http://tools.ietf.org/html/rfc3
 for parsing URI or URLs.
 """
 depends: [
-  "ocaml" {>= "4.04.0"}
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.2.0"}
   "ounit2" {with-test & >= "1.0.2"}
   "ppx_sexp_conv" {with-test & >= "v0.9.0"}
   "re" {>= "1.9.0"}
+  "uri" {= version}
   "stringext" {>= "1.4.0"}
+  "crowbar" {with-test}
 ]
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   ["dune" "build" "-p" name "-j" jobs]
-  ["dune" "runtest" "-p" name "-j" jobs] {with-test}
+  ["dune" "runtest" "-p" name "-j" jobs] {with-test & os != "macos"}
 ]
 messages: [ "Deprecated. This package is outdated, you should consider using uri instead" ]
diff --git a/uri-sexp.opam b/uri-sexp.opam
index fb249a5..66b1200 100644
--- a/uri-sexp.opam
+++ b/uri-sexp.opam
@@ -19,7 +19,7 @@ depends: [
   "ounit2" {with-test}
 ]
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   ["dune" "build" "-p" name "-j" jobs]
   ["dune" "runtest" "-p" name "-j" jobs] {with-test}
 ]
diff --git a/uri.opam b/uri.opam
index 5cee37a..04219dc 100644
--- a/uri.opam
+++ b/uri.opam
@@ -13,7 +13,7 @@ This is an OCaml implementation of the [RFC3986](http://tools.ietf.org/html/rfc3
 for parsing URI or URLs.
 """
 depends: [
-  "ocaml" {>= "4.04.0"}
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.2.0"}
   "ounit2" {with-test & >= "1.0.2"}
   "ppx_sexp_conv" {with-test & >= "v0.9.0"}
@@ -22,7 +22,7 @@ depends: [
   "angstrom" {>= "0.14.0"}
 ]
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   ["dune" "build" "-p" name "-j" jobs]
-  ["dune" "runtest" "-p" name "-j" jobs] {with-test}
+  ["dune" "runtest" "-p" name "-j" jobs] {with-test & os != "macos"}
 ]