diff --git a/packages/distributed/distributed.0.2.0/opam b/packages/distributed/distributed.0.2.0/opam
index 155569e146eb..9e025839122c 100644
--- a/packages/distributed/distributed.0.2.0/opam
+++ b/packages/distributed/distributed.0.2.0/opam
@@ -21,7 +21,7 @@ depends: [
   "base-threads"
   "base-unix"
   "batteries"
-  "lwt" {< "4.0.0"}
+  "lwt" {< "3.0.0"}
   "ocamlfind" {build}
   "ounit" {test & >= "2.0"}
 ]
diff --git a/packages/distributed/distributed.0.3.0/opam b/packages/distributed/distributed.0.3.0/opam
index 560f2ab16ea3..4d6c44e27bd9 100644
--- a/packages/distributed/distributed.0.3.0/opam
+++ b/packages/distributed/distributed.0.3.0/opam
@@ -20,7 +20,7 @@ remove: ["ocamlfind" "remove" "distributed"]
 depends: [
   "base-threads"
   "base-unix"
-  "lwt" {< "4.0.0"}
+  "lwt" {< "3.0.0"}
   "ocamlfind" {build}
   "ounit" {test & >= "2.0"}
 ]
diff --git a/packages/openflow/openflow.0.1.1/opam b/packages/openflow/openflow.0.1.1/opam
index 869239ceb607..ae1ee972dd7d 100644
--- a/packages/openflow/openflow.0.1.1/opam
+++ b/packages/openflow/openflow.0.1.1/opam
@@ -13,7 +13,7 @@ depends: [
   "camlp4"
   "ocamlbuild" {build}
 ]
-conflits: [
+conflicts: [
   "lwt" {>= "4.0.0"}
 ]
 dev-repo: "git://github.com/frenetic-lang/ocaml-openflow"
diff --git a/packages/vhd-format/vhd-format.0.0.2/opam b/packages/vhd-format/vhd-format.0.0.2/opam
index 1d621a260416..626e59b6d667 100644
--- a/packages/vhd-format/vhd-format.0.0.2/opam
+++ b/packages/vhd-format/vhd-format.0.0.2/opam
@@ -8,7 +8,7 @@ build: make
 remove: [[make "uninstall" "BINDIR=%{bin}%"]]
 depends: [
   "ocamlfind"
-  "lwt" {>= "2.4.3" & < "4.0.0"}
+  "lwt" {>= "2.4.3" & < "2.4.7"}
   "cstruct" {>= "0.7.1" & <"2.0.0"}
   "ounit"
   "ocamlbuild" {build}