diff --git a/dune-project b/dune-project
index 82e6e252..813936c6 100644
--- a/dune-project
+++ b/dune-project
@@ -1,6 +1,4 @@
-(lang dune 3.0)
-
-(using cinaps 1.0)
+(lang dune 2.0)
 
 ;(implicit_transitive_deps false)
 
diff --git a/linol-eio.opam b/linol-eio.opam
index 81c5f9c7..22898f62 100644
--- a/linol-eio.opam
+++ b/linol-eio.opam
@@ -8,7 +8,7 @@ license: "MIT"
 homepage: "https://github.com/c-cube/linol"
 bug-reports: "https://github.com/c-cube/linol/issues"
 depends: [
-  "dune" {>= "3.0"}
+  "dune" {>= "2.0"}
   "yojson" {>= "1.6"}
   "linol" {= version}
   "base-unix"
@@ -17,7 +17,7 @@ depends: [
   "odoc" {with-doc}
 ]
 build: [
-  ["dune" "subst"] {dev}
+  ["dune" "subst"] {pinned}
   [
     "dune"
     "build"
diff --git a/linol-lwt.opam b/linol-lwt.opam
index 84039de7..cf2cceab 100644
--- a/linol-lwt.opam
+++ b/linol-lwt.opam
@@ -8,7 +8,7 @@ license: "MIT"
 homepage: "https://github.com/c-cube/linol"
 bug-reports: "https://github.com/c-cube/linol/issues"
 depends: [
-  "dune" {>= "3.0"}
+  "dune" {>= "2.0"}
   "yojson" {>= "1.6"}
   "linol" {= version}
   "base-unix"
@@ -16,7 +16,7 @@ depends: [
   "odoc" {with-doc}
 ]
 build: [
-  ["dune" "subst"] {dev}
+  ["dune" "subst"] {pinned}
   [
     "dune"
     "build"
diff --git a/linol.opam b/linol.opam
index 29e8142d..5579adc1 100644
--- a/linol.opam
+++ b/linol.opam
@@ -8,7 +8,7 @@ license: "MIT"
 homepage: "https://github.com/c-cube/linol"
 bug-reports: "https://github.com/c-cube/linol/issues"
 depends: [
-  "dune" {>= "3.0"}
+  "dune" {>= "2.0"}
   "yojson" {>= "1.6"}
   "logs"
   "trace" {>= "0.4"}
@@ -18,7 +18,7 @@ depends: [
   "ppx_yojson_conv_lib" {>= "v0.14"}
 ]
 build: [
-  ["dune" "subst"] {dev}
+  ["dune" "subst"] {pinned}
   [
     "dune"
     "build"