diff --git a/albatross.opam b/albatross.opam
index 3197c63..c036cf0 100644
--- a/albatross.opam
+++ b/albatross.opam
@@ -9,7 +9,7 @@ depends: [
   "ocaml" {>= "4.05.0"}
   "dune" {build}
   "lwt" {>= "3.0.0"}
-  "ipaddr" {>= "2.9.0"}
+  "ipaddr" {>= "4.0.0"}
   "hex"
   "cstruct"
   "logs"
@@ -24,7 +24,7 @@ depends: [
   "nocrypto"
   "asn1-combinators" {>= "0.2.0"}
   "duration"
-  "decompress" {>= "0.8.1"}
+  "decompress" {>= "0.9.0"}
   "checkseum"
 ]
 
diff --git a/src/vmm_asn.ml b/src/vmm_asn.ml
index 512d093..8f93ee7 100644
--- a/src/vmm_asn.ml
+++ b/src/vmm_asn.ml
@@ -24,8 +24,8 @@ let projections_of asn =
   (decode_strict c, Asn.encode c)
 
 let ipv4 =
-  let f cs = Ipaddr.V4.of_bytes_exn (Cstruct.to_string cs)
-  and g ip = Cstruct.of_string (Ipaddr.V4.to_bytes ip)
+  let f cs = Ipaddr.V4.of_octets_exn (Cstruct.to_string cs)
+  and g ip = Cstruct.of_string (Ipaddr.V4.to_octets ip)
   in
   Asn.S.map f g Asn.S.octet_string
 
diff --git a/src/vmm_compress.ml b/src/vmm_compress.ml
index 7200c73..b0e4374 100644
--- a/src/vmm_compress.ml
+++ b/src/vmm_compress.ml
@@ -1,7 +1,8 @@
 (* copied n 2018-03-18 from github.com:mirage/decompress.git (bin/easy.ml)
    (MIT licensed) at fa1551b19165503fc77da6da99411fa59b6a7f6a by Hannes Mehnert
 *)
-
+(* edited to reflect later API (v0.9.0) changes on 2019-07-16 *)
+module Stdlib_buffer = Buffer
 open Decompress
 
 (* Keep in your mind, this is an easy example of Decompress but not efficient.
@@ -22,7 +23,7 @@ let compress ?(level = 4) data =
   (* We need to allocate an output buffer, is like you can. it's depends your
      capabilities of your writing. *)
   let pos = ref 0 in
-  let res = Buffer.create (String.length data) in
+  let res = Stdlib_buffer.create (String.length data) in
   (* The buffer is not a good idea. In fact, we can have a memory problem with
      that (like if the output is too big). You need to keep in your mind that
      is insecure to let a buffer to grow automatically (an attacker can use
@@ -66,13 +67,13 @@ let compress ?(level = 4) data =
           pos := !pos + n ;
           n )
     (fun output_buffer len ->
-      Buffer.add_subbytes res output_buffer 0 len ;
+      Stdlib_buffer.add_subbytes res output_buffer 0 len ;
       0xFFFF )
-    (Zlib_deflate.default ~witness:B.bytes level)
+    (Zlib_deflate.default ~witness:Buffer.bytes level)
   (* We can specify the level of the compression, see the documentation to know
      what we use for each level. The default is 4. *)
   |> function
-  | Ok _ -> Buffer.contents res
+  | Ok _ -> Stdlib_buffer.contents res
   | Error e ->
     Logs.err (fun m -> m "error %a while compressing" Zlib_deflate.pp_error e) ;
     invalid_arg "cannot compress"
@@ -83,7 +84,7 @@ let uncompress data =
      your reading. *)
   let output_buffer = Bytes.create 0xFFFF in
   (* Same as [compress]. *)
-  let window = Window.create ~witness:B.bytes in
+  let window = Window.create ~crc:Window.adler32 ~witness:Buffer.bytes in
   (* We allocate a window. We let the user to do that to reuse the window if
      it's needed. In fact, the window is a big buffer ([size = (1 << 15)]) and
      allocate this buffer costs.
@@ -91,7 +92,7 @@ let uncompress data =
      So in this case, we decompress only one time but if you want to decompress
      some flows, you can reuse this window after a [Window.reset]. *)
   let pos = ref 0 in
-  let res = Buffer.create (String.length data) in
+  let res = Stdlib_buffer.create (String.length data) in
   Zlib_inflate.bytes input_buffer output_buffer
     (* Same logic as [compress]. *)
       (fun input_buffer ->
@@ -100,11 +101,11 @@ let uncompress data =
       pos := !pos + n ;
       n )
     (fun output_buffer len ->
-      Buffer.add_subbytes res output_buffer 0 len ;
+      Stdlib_buffer.add_subbytes res output_buffer 0 len ;
       0xFFFF )
-    (Zlib_inflate.default ~witness:B.bytes window)
+    (Zlib_inflate.default ~witness:Buffer.bytes window)
   |> function
-  | Ok _ -> Ok (Buffer.contents res)
+  | Ok _ -> Ok (Stdlib_buffer.contents res)
   | Error exn ->
     Logs.err (fun m -> m "error %a while uncompressing" Zlib_inflate.pp_error exn) ;
     Error ()