diff --git a/packages/letsencrypt-app/letsencrypt-app.0.3.0/opam b/packages/letsencrypt-app/letsencrypt-app.0.3.0/opam
index 5ded8406f7b..d93502b63fb 100644
--- a/packages/letsencrypt-app/letsencrypt-app.0.3.0/opam
+++ b/packages/letsencrypt-app/letsencrypt-app.0.3.0/opam
@@ -18,7 +18,7 @@ depends: [
   "logs"
   "fmt"
   "lwt" {>= "2.6.0"}
-  "mirage-crypto-rng"
+  "mirage-crypto-rng" {< "0.11.0"}
   "ptime"
   "bos"
   "fpath"
diff --git a/packages/letsencrypt-app/letsencrypt-app.0.4.0/opam b/packages/letsencrypt-app/letsencrypt-app.0.4.0/opam
index d3f5b544cbf..d9fe4f1d292 100644
--- a/packages/letsencrypt-app/letsencrypt-app.0.4.0/opam
+++ b/packages/letsencrypt-app/letsencrypt-app.0.4.0/opam
@@ -18,7 +18,7 @@ depends: [
   "logs"
   "fmt"
   "lwt" {>= "2.6.0"}
-  "mirage-crypto-rng"
+  "mirage-crypto-rng" {< "0.11.0"}
   "ptime"
   "bos"
   "fpath"
diff --git a/packages/letsencrypt-app/letsencrypt-app.0.4.1/opam b/packages/letsencrypt-app/letsencrypt-app.0.4.1/opam
index 2ac73500092..b9825b4806b 100644
--- a/packages/letsencrypt-app/letsencrypt-app.0.4.1/opam
+++ b/packages/letsencrypt-app/letsencrypt-app.0.4.1/opam
@@ -18,7 +18,7 @@ depends: [
   "logs"
   "fmt" {>= "0.8.7"}
   "lwt" {>= "2.6.0"}
-  "mirage-crypto-rng"
+  "mirage-crypto-rng" {< "0.11.0"}
   "ptime"
   "bos"
   "fpath"
diff --git a/packages/letsencrypt/letsencrypt.0.2.1/opam b/packages/letsencrypt/letsencrypt.0.2.1/opam
index dc79f95ec09..f0734096a71 100644
--- a/packages/letsencrypt/letsencrypt.0.2.1/opam
+++ b/packages/letsencrypt/letsencrypt.0.2.1/opam
@@ -25,8 +25,7 @@ depends: [
   "mirage-crypto"
   "mirage-crypto-pk"
   "mirage-crypto-pk" {with-test & != "0.8.9"}
-  "mirage-crypto-rng"
-  "mirage-crypto-rng" {with-test & < "0.11.0"}
+  "mirage-crypto-rng" {< "0.11.0"}
   "x509" {>= "0.10.0" & < "0.11.0"}
   "yojson" {>= "1.6.0"}
   "ounit" {with-test}
diff --git a/packages/letsencrypt/letsencrypt.0.2.2/opam b/packages/letsencrypt/letsencrypt.0.2.2/opam
index 1127e171cb0..1ce00bb2605 100644
--- a/packages/letsencrypt/letsencrypt.0.2.2/opam
+++ b/packages/letsencrypt/letsencrypt.0.2.2/opam
@@ -25,8 +25,7 @@ depends: [
   "mirage-crypto"
   "mirage-crypto-pk"
   "mirage-crypto-pk" {with-test & != "0.8.9"}
-  "mirage-crypto-rng"
-  "mirage-crypto-rng" {with-test & < "0.11.0"}
+  "mirage-crypto-rng" {< "0.11.0"}
   "x509" {>= "0.11.0" & < "0.12.0"}
   "yojson" {>= "1.6.0"}
   "ounit" {with-test}
diff --git a/packages/letsencrypt/letsencrypt.0.2.3/opam b/packages/letsencrypt/letsencrypt.0.2.3/opam
index 749b7977502..175d4de785d 100644
--- a/packages/letsencrypt/letsencrypt.0.2.3/opam
+++ b/packages/letsencrypt/letsencrypt.0.2.3/opam
@@ -25,8 +25,7 @@ depends: [
   "mirage-crypto"
   "mirage-crypto-pk"
   "mirage-crypto-pk" {with-test & >= "0.8.9"}
-  "mirage-crypto-rng"
-  "mirage-crypto-rng" {with-test & < "0.11.0"}
+  "mirage-crypto-rng" {< "0.11.0"}
   "x509" {>= "0.11.0" & < "0.12.0"}
   "yojson" {>= "1.6.0"}
   "ounit" {with-test}
diff --git a/packages/letsencrypt/letsencrypt.0.2.4/opam b/packages/letsencrypt/letsencrypt.0.2.4/opam
index d1f9192fb6d..5ce60a368c8 100644
--- a/packages/letsencrypt/letsencrypt.0.2.4/opam
+++ b/packages/letsencrypt/letsencrypt.0.2.4/opam
@@ -25,8 +25,7 @@ depends: [
   "mirage-crypto"
   "mirage-crypto-pk"
   "mirage-crypto-pk" {with-test & >= "0.8.9"}
-  "mirage-crypto-rng"
-  "mirage-crypto-rng" {with-test & < "0.11.0"}
+  "mirage-crypto-rng" {< "0.11.0"}
   "x509" {>= "0.11.0" & < "0.13.0"}
   "yojson" {>= "1.6.0"}
   "ounit" {with-test}
diff --git a/packages/letsencrypt/letsencrypt.0.2.5/opam b/packages/letsencrypt/letsencrypt.0.2.5/opam
index 19571096524..0b1801c3541 100644
--- a/packages/letsencrypt/letsencrypt.0.2.5/opam
+++ b/packages/letsencrypt/letsencrypt.0.2.5/opam
@@ -25,8 +25,7 @@ depends: [
   "mirage-crypto"
   "mirage-crypto-pk"
   "mirage-crypto-pk" {with-test & >= "0.8.9"}
-  "mirage-crypto-rng"
-  "mirage-crypto-rng" {with-test & < "0.11.0"}
+  "mirage-crypto-rng" {< "0.11.0"}
   "x509" {>= "0.13.0"}
   "yojson" {>= "1.6.0"}
   "ounit" {with-test}