diff --git a/Cargo.lock b/Cargo.lock
index 6582b976f554..64ecac495114 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3125,8 +3125,7 @@ checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 [[package]]
 name = "utoipa"
 version = "5.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2fcc29c80c21c31608227e0912b2d7fddba57ad76b606890627ba8ee7964e993"
+source = "git+https://github.com/rustyrussell/utoipa.git#26f4908b092a4a746cbec935e05165852ea01289"
 dependencies = [
  "indexmap 2.10.0",
  "serde",
@@ -3137,8 +3136,7 @@ dependencies = [
 [[package]]
 name = "utoipa-gen"
 version = "5.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d79d08d92ab8af4c5e8a6da20c47ae3f61a0f1dabc1997cdf2d082b757ca08b"
+source = "git+https://github.com/rustyrussell/utoipa.git#26f4908b092a4a746cbec935e05165852ea01289"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3149,8 +3147,7 @@ dependencies = [
 [[package]]
 name = "utoipa-swagger-ui"
 version = "9.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d047458f1b5b65237c2f6dc6db136945667f40a7668627b3490b9513a3d43a55"
+source = "git+https://github.com/rustyrussell/utoipa.git#26f4908b092a4a746cbec935e05165852ea01289"
 dependencies = [
  "axum 0.8.4",
  "base64 0.22.1",
@@ -3168,8 +3165,7 @@ dependencies = [
 [[package]]
 name = "utoipa-swagger-ui-vendored"
 version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2eebbbfe4093922c2b6734d7c679ebfebd704a0d7e56dfcb0d05818ce28977d"
+source = "git+https://github.com/rustyrussell/utoipa.git#26f4908b092a4a746cbec935e05165852ea01289"
 
 [[package]]
 name = "valuable"
diff --git a/plugins/rest-plugin/Cargo.toml b/plugins/rest-plugin/Cargo.toml
index 32b74a4f0b3d..09b38fae837f 100644
--- a/plugins/rest-plugin/Cargo.toml
+++ b/plugins/rest-plugin/Cargo.toml
@@ -26,12 +26,12 @@ rcgen = "0.13"
 hyper = "1"
 tower= "0.5"
 tower-http = { version = "0.6", features = ["cors", "set-header"] }
-utoipa = { version = "5", features = ['axum_extras'] }
+utoipa = { git = "https://github.com/rustyrussell/utoipa.git", features = ['axum_extras'] }
 
 log-panics = "2"
 socketioxide = "0.15"
 
 cln-plugin = { version = "0.5", path = "../../plugins" }
 cln-rpc = { version = "0.5", path = "../../cln-rpc" }
-utoipa-swagger-ui = { version = "9.0.0", features = ["vendored", "axum"] }
+utoipa-swagger-ui = { git = "https://github.com/rustyrussell/utoipa.git", features = ["vendored", "axum"] }
 
diff --git a/tools/build-release.sh b/tools/build-release.sh
index fb6478903039..af21551648e9 100755
--- a/tools/build-release.sh
+++ b/tools/build-release.sh
@@ -127,6 +127,8 @@ if [ "$WITHOUT_ZIP" = "false" ]; then
     # submodcheck needs to know if we have lowdown
     touch config.vars
     ./configure --reconfigure
+    # If you don't have lowdown, your zip file will include it: we assume everyone has it now!
+    grep -q "HAVE_LOWDOWN=1" config.vars || (echo "Please install lowdown" >&2; exit 1)
     # If it's a completely clean directory, we need submodules!
     make submodcheck