diff --git a/packages/albatross.1.4.2.1~dev/opam b/packages/albatross.1.4.2.1~dev/opam
index 14c0b36..d4019c6 100644
--- a/packages/albatross.1.4.2.1~dev/opam
+++ b/packages/albatross.1.4.2.1~dev/opam
@@ -8,7 +8,7 @@ license: "ISC"
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {< "3.0"}
+  "dune"
   "dune-configurator"
   "conf-pkg-config" {build}
   "conf-libnl3" {os = "linux"}
diff --git a/packages/builder-web.0.2.0~dev/opam b/packages/builder-web.0.2.0~dev/opam
index edcf90c..175812a 100644
--- a/packages/builder-web.0.2.0~dev/opam
+++ b/packages/builder-web.0.2.0~dev/opam
@@ -16,7 +16,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.7.0" & < "3.0.0"}
+  "dune" {>= "2.7.0"}
   "builder" {>= "0.2.0"}
   "dream" {= "1.0.0~alpha2"}
   "cstruct" {>= "6.0.0"}
diff --git a/packages/builder.0.3.1~dev/opam b/packages/builder.0.3.1~dev/opam
index 5685e5e..613e210 100644
--- a/packages/builder.0.3.1~dev/opam
+++ b/packages/builder.0.3.1~dev/opam
@@ -8,7 +8,7 @@ license: "ISC"
 
 depends: [
   "ocaml" {>= "4.08.0"}
-  "dune" {>= "2.0.0" & < "3.0"}
+  "dune" {>= "2.0.0"}
   "asn1-combinators"
   "bheap"
   "bos"
diff --git a/packages/jackline.0.1~dev/opam b/packages/jackline.0.1~dev/opam
index 189a397..4b2b6b0 100644
--- a/packages/jackline.0.1~dev/opam
+++ b/packages/jackline.0.1~dev/opam
@@ -26,7 +26,7 @@ license: "BSD2"
 homepage: "https://github.com/hannesm/jackline"
 bug-reports: "https://github.com/hannesm/jackline/issues"
 depends: [
-  "dune" {>= "2.5" & < "3.0"}
+  "dune" {>= "2.5"}
   "ocaml" {>= "4.08"}
   "ppx_sexp_conv" {build}
   "ppx_deriving" {>= "0.14.0"}
diff --git a/packages/mirage-unikernel-hello-hvt.0.0.1/opam b/packages/mirage-unikernel-hello-hvt.0.0.1/opam
index f65325a..0aaf990 100644
--- a/packages/mirage-unikernel-hello-hvt.0.0.1/opam
+++ b/packages/mirage-unikernel-hello-hvt.0.0.1/opam
@@ -15,7 +15,6 @@ depends: [ "duration"
            "ocaml" {build &  >= "4.08.0"}
            "ocamlbuild" {build}
            "ocamlfind" {build}
-           "dune" {< "3.0.0"}
            "solo5-bindings-hvt" { >= "0.6.0" & < "0.7.0"}
 ]
 maintainer: "dummy"
diff --git a/packages/mirage-unikernel-static-website-hvt.0.0.1/opam b/packages/mirage-unikernel-static-website-hvt.0.0.1/opam
index 5bd0e69..1ed72a8 100644
--- a/packages/mirage-unikernel-static-website-hvt.0.0.1/opam
+++ b/packages/mirage-unikernel-static-website-hvt.0.0.1/opam
@@ -28,7 +28,6 @@ depends: [ "arp" { >= "3.0.0" & < "4.0.0"}
            "tcpip" { >= "7.0.0" & < "8.0.0"}
            "tls-mirage" { >= "0.13.0" & < "0.16.0"}
            "uri"
-           "dune" {< "3.0"}
 ]
 maintainer: "dummy"
 authors: "dummy"
diff --git a/packages/monitoring-experiments.0.0.3~dev/opam b/packages/monitoring-experiments.0.0.3~dev/opam
index 0bfb40a..2401dee 100644
--- a/packages/monitoring-experiments.0.0.3~dev/opam
+++ b/packages/monitoring-experiments.0.0.3~dev/opam
@@ -9,7 +9,7 @@ license: "AGPL"
 
 depends: [
   "ocaml" {>= "4.08.0"}
-  "dune" {< "3.0"}
+  "dune"
   "logs" {>= "0.6.3"}
   "metrics" {>= "0.4.0"}
   "metrics-lwt" {>= "0.2.0"}