diff --git a/CHANGES.md b/CHANGES.md
index 3acca53be3..a4b522c25b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,12 @@
-## v3.0.0 (2020-10-02)
+## current
+
+- fix opam files and dependencies
+- add GitHub Actions workflow (@smorimoto #739)
+- lwt_jsoo: Forward exceptions to caller when response is null (@mefyl #738)
+- Remove wrapped false (@rgrinberg #734)
+- Use implicit executable dependency for generate.exe (@TheLortex #735)
+
+## v3.0.0 (2020-10-02) -- unreleased
 
 - cohttp: update HTTP codes (@emillon #711)
 - cohttp: add Uti.t to uri scheme (@brendanlong #707)
diff --git a/cohttp-lwt-unix-nossl.opam b/cohttp-lwt-unix-nossl.opam
index 6c2ba04f48..95754e768a 100644
--- a/cohttp-lwt-unix-nossl.opam
+++ b/cohttp-lwt-unix-nossl.opam
@@ -36,6 +36,7 @@ depends: [
   "cohttp-lwt" {=version}
   "lwt" {>= "3.0.0"}
   "base-unix"
+  "ppx_sexp_conv" {>= "v0.13.0"}
   "ounit" {with-test}
 ]
 build: [
diff --git a/cohttp-lwt-unix-ssl.opam b/cohttp-lwt-unix-ssl.opam
index eec9da7676..9887ff1352 100644
--- a/cohttp-lwt-unix-ssl.opam
+++ b/cohttp-lwt-unix-ssl.opam
@@ -36,6 +36,7 @@ depends: [
   "fmt" {>= "0.8.2"}
   "cohttp-lwt" {=version}
   "cohttp-lwt-unix-nossl" {=version}
+  "ppx_sexp_conv" {>= "v0.13.0"}
   "lwt" {>= "3.0.0"}
   "base-unix"
   "ounit" {with-test}
diff --git a/cohttp-lwt-unix.opam b/cohttp-lwt-unix.opam
index 78b7b01441..d0cc1288bd 100644
--- a/cohttp-lwt-unix.opam
+++ b/cohttp-lwt-unix.opam
@@ -36,6 +36,7 @@ depends: [
   "fmt" {>= "0.8.2"}
   "cohttp-lwt" {=version}
   "cohttp-lwt-unix-nossl" {=version}
+  "ppx_sexp_conv" {>= "v0.13.0"}
   "lwt" {>= "3.0.0"}
   "base-unix"
   "ounit" {with-test}
diff --git a/cohttp-lwt.opam b/cohttp-lwt.opam
index d640da862a..81221da0fe 100644
--- a/cohttp-lwt.opam
+++ b/cohttp-lwt.opam
@@ -32,6 +32,7 @@ depends: [
   "sexplib0"
   "ppx_sexp_conv" {>= "v0.13.0"}
   "logs"
+  "uri" {>= "2.0.0"}
 ]
 build: [
   ["dune" "subst"] {pinned}
diff --git a/cohttp-mirage.opam b/cohttp-mirage.opam
index 5d94e88536..5dc4b02bad 100644
--- a/cohttp-mirage.opam
+++ b/cohttp-mirage.opam
@@ -30,6 +30,7 @@ depends: [
   "cohttp-lwt" {=version}
   "astring"
   "magic-mime"
+  "ppx_sexp_conv" {>= "v0.13.0"}
 ]
 build: [
   ["dune" "subst"] {pinned}