diff --git a/packages/charrua/charrua.1.0.0/opam b/packages/charrua/charrua.1.0.0/opam
index 4c2ea1275c6..0984b90e886 100644
--- a/packages/charrua/charrua.1.0.0/opam
+++ b/packages/charrua/charrua.1.0.0/opam
@@ -13,13 +13,13 @@ build: [
 ]
 
 depends: [
-  "dune" {>= "1.0"}
+  "dune"
   "ppx_sexp_conv" {>="v0.10.0"}
   "ppx_cstruct"
   "ocaml"         {>= "4.04.2"}
   "cstruct"       {>= "3.0.1"}
   "sexplib"
-  "ipaddr"        {>= "3.0.0"}
+  "ipaddr"        {>= "3.0.0" & < "4.0.0"}
   "macaddr"
   "ethernet"      {>= "2.0.0"}
   "tcpip"         {>= "3.7.0"}