diff --git a/packages/DrawGrammar/DrawGrammar.0.2.1/opam b/packages/DrawGrammar/DrawGrammar.0.2.1/opam
index b4a4b776e84..53ede8d03c3 100644
--- a/packages/DrawGrammar/DrawGrammar.0.2.1/opam
+++ b/packages/DrawGrammar/DrawGrammar.0.2.1/opam
@@ -15,4 +15,4 @@ depends: [
   "cairo2"
   "General" {>= "0.4.0"}
 ]
-available: [ocaml-version >= "4.02.3" & ocaml-version < "4.06.0"]
+available: [ocaml-version >= "4.02.3"]
diff --git a/packages/General/General.0.4.0/opam b/packages/General/General.0.4.0/opam
index 10bfec50eb5..3d63519e6f8 100644
--- a/packages/General/General.0.4.0/opam
+++ b/packages/General/General.0.4.0/opam
@@ -11,5 +11,6 @@ build-test: ["jbuilder" "runtest" "-p" name]
 depends: [
   "jbuilder" {build}
   "cppo" {build & >= "1.3.0"}
+  "num"
 ]
-available: [ocaml-version >= "4.02.3" & ocaml-version < "4.06.0"]
+available: [ocaml-version >= "4.02.3"]
diff --git a/packages/JsOfOCairo/JsOfOCairo.1.0.1/opam b/packages/JsOfOCairo/JsOfOCairo.1.0.1/opam
index 18e4009dcba..1d24ff6e21e 100644
--- a/packages/JsOfOCairo/JsOfOCairo.1.0.1/opam
+++ b/packages/JsOfOCairo/JsOfOCairo.1.0.1/opam
@@ -15,4 +15,4 @@ depends: [
   "js_of_ocaml" {>= "3.0" & < "4.0"}
   "cairo2"
 ]
-available: [ocaml-version >= "4.02.3" & ocaml-version < "4.06.0"]
+available: [ocaml-version >= "4.02.3"]
diff --git a/packages/hashids/hashids.1.0.0/opam b/packages/hashids/hashids.1.0.0/opam
index ac5c38325b2..03a69d7bbdf 100644
--- a/packages/hashids/hashids.1.0.0/opam
+++ b/packages/hashids/hashids.1.0.0/opam
@@ -12,4 +12,4 @@ depends: [
   "jbuilder" {build}
   "General" {>= "0.4.0"}
 ]
-available: [ocaml-version >= "4.02.3" & ocaml-version < "4.06.0"]
+available: [ocaml-version >= "4.02.3"]