diff --git a/packages/icalendar/icalendar.0.1.0/opam b/packages/icalendar/icalendar.0.1.0/opam
index 0f1687db9b8..b42ddfbd9bc 100644
--- a/packages/icalendar/icalendar.0.1.0/opam
+++ b/packages/icalendar/icalendar.0.1.0/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.05.0" & < "5.0.0"}
-  "dune"
+  "dune" {>= "1.3"}
   "alcotest" {with-test & < "1.0.0"}
   "fmt"
   "angstrom" {< "0.14.0"}
diff --git a/packages/icalendar/icalendar.0.1.1/opam b/packages/icalendar/icalendar.0.1.1/opam
index 9fad4a0beff..55b021ce392 100644
--- a/packages/icalendar/icalendar.0.1.1/opam
+++ b/packages/icalendar/icalendar.0.1.1/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.05.0" & < "5.0.0"}
-  "dune"
+  "dune" {>= "1.3"}
   "alcotest" {with-test & < "1.0.0"}
   "fmt"
   "angstrom" {< "0.14.0"}
diff --git a/packages/icalendar/icalendar.0.1.2/opam b/packages/icalendar/icalendar.0.1.2/opam
index da206313b23..14341c9accb 100644
--- a/packages/icalendar/icalendar.0.1.2/opam
+++ b/packages/icalendar/icalendar.0.1.2/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.05.0" & < "5.0.0"}
-  "dune"
+  "dune" {>= "1.3"}
   "alcotest" {with-test & < "1.0.0"}
   "fmt"
   "angstrom" {< "0.14.0"}