diff --git a/packages/albatross.1.4.2.1~dev/opam b/packages/albatross.1.4.2.1~dev/opam
index b176832..583e587 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"
+  "dune" {< "3.0"}
   "dune-configurator"
   "conf-pkg-config" {build}
   "conf-libnl3" {os = "linux"}
diff --git a/packages/builder.0.3.1~dev/opam b/packages/builder.0.3.1~dev/opam
index 613e210..5685e5e 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"}
+  "dune" {>= "2.0.0" & < "3.0"}
   "asn1-combinators"
   "bheap"
   "bos"
diff --git a/packages/jackline.0.1~dev/opam b/packages/jackline.0.1~dev/opam
index 4b2b6b0..189a397 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"}
+  "dune" {>= "2.5" & < "3.0"}
   "ocaml" {>= "4.08"}
   "ppx_sexp_conv" {build}
   "ppx_deriving" {>= "0.14.0"}