diff --git a/Cargo.lock b/Cargo.lock
index 7bf6594759..397778e6ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4521,9 +4521,9 @@ dependencies = [
 
 [[package]]
 name = "tonic-reflection"
-version = "0.12.1"
+version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b742c83ad673e9ab5b4ce0981f7b9e8932be9d60e8682cbf9120494764dbc173"
+checksum = "7b56b874eedb04f89907573b408eab1e87c1c1dce43aac6ad63742f57faa99ff"
 dependencies = [
  "prost 0.13.1",
  "prost-types 0.13.1",
diff --git a/Cargo.nix b/Cargo.nix
index 274d3d1d1a..c9fec85e2e 100644
--- a/Cargo.nix
+++ b/Cargo.nix
@@ -14692,9 +14692,9 @@ rec {
       };
       "tonic-reflection" = rec {
         crateName = "tonic-reflection";
-        version = "0.12.1";
+        version = "0.12.2";
         edition = "2021";
-        sha256 = "0wy1vdj4fj90j6zjqs78c2fvwcl9krxiz6709idspsbksqxchhmp";
+        sha256 = "1zwrm9zzahipsrmaqfp4vk0w31qymf740fsp0yczh16vxrsbhmkv";
         libName = "tonic_reflection";
         authors = [
           "James Nugent <james@jen20.com>"
diff --git a/build/Cargo.toml b/build/Cargo.toml
index 8bb68783f0..6a10b41e2e 100644
--- a/build/Cargo.toml
+++ b/build/Cargo.toml
@@ -20,7 +20,7 @@ mimalloc = "0.1.43"
 
 [dependencies.tonic-reflection]
 optional = true
-version = "0.12.0"
+version = "0.12.2"
 
 [build-dependencies]
 prost-build = "0.13.1"
diff --git a/build/src/bin/tvix-build.rs b/build/src/bin/tvix-build.rs
index 93e85871ca..b840e031db 100644
--- a/build/src/bin/tvix-build.rs
+++ b/build/src/bin/tvix-build.rs
@@ -90,11 +90,18 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
 
             #[cfg(feature = "tonic-reflection")]
             {
-                let reflection_svc = tonic_reflection::server::Builder::configure()
-                    .register_encoded_file_descriptor_set(CASTORE_FILE_DESCRIPTOR_SET)
-                    .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET)
-                    .build()?;
-                router = router.add_service(reflection_svc);
+                router = router.add_service(
+                    tonic_reflection::server::Builder::configure()
+                        .register_encoded_file_descriptor_set(CASTORE_FILE_DESCRIPTOR_SET)
+                        .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET)
+                        .build_v1alpha()?,
+                );
+                router = router.add_service(
+                    tonic_reflection::server::Builder::configure()
+                        .register_encoded_file_descriptor_set(CASTORE_FILE_DESCRIPTOR_SET)
+                        .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET)
+                        .build_v1()?,
+                );
             }
 
             info!(listen_address=%listen_address, "listening");
diff --git a/castore/Cargo.toml b/castore/Cargo.toml
index ded2292db7..e04a97cb00 100644
--- a/castore/Cargo.toml
+++ b/castore/Cargo.toml
@@ -60,7 +60,7 @@ optional = true
 
 [dependencies.tonic-reflection]
 optional = true
-version = "0.12.0"
+version = "0.12.2"
 
 [dependencies.vhost]
 optional = true
diff --git a/store/Cargo.toml b/store/Cargo.toml
index 0cbaa102f0..7df14ce895 100644
--- a/store/Cargo.toml
+++ b/store/Cargo.toml
@@ -50,7 +50,7 @@ mimalloc = "0.1.43"
 
 [dependencies.tonic-reflection]
 optional = true
-version = "0.12.0"
+version = "0.12.2"
 
 [dependencies.bigtable_rs]
 optional = true
diff --git a/store/src/bin/tvix-store.rs b/store/src/bin/tvix-store.rs
index d9d5b1597b..6da239a8fe 100644
--- a/store/src/bin/tvix-store.rs
+++ b/store/src/bin/tvix-store.rs
@@ -201,11 +201,18 @@ async fn run_cli(cli: Cli) -> Result<(), Box<dyn std::error::Error + Send + Sync
 
             #[cfg(feature = "tonic-reflection")]
             {
-                let reflection_svc = tonic_reflection::server::Builder::configure()
-                    .register_encoded_file_descriptor_set(CASTORE_FILE_DESCRIPTOR_SET)
-                    .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET)
-                    .build()?;
-                router = router.add_service(reflection_svc);
+                router = router.add_service(
+                    tonic_reflection::server::Builder::configure()
+                        .register_encoded_file_descriptor_set(CASTORE_FILE_DESCRIPTOR_SET)
+                        .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET)
+                        .build_v1alpha()?,
+                );
+                router = router.add_service(
+                    tonic_reflection::server::Builder::configure()
+                        .register_encoded_file_descriptor_set(CASTORE_FILE_DESCRIPTOR_SET)
+                        .register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET)
+                        .build_v1()?,
+                );
             }
 
             let listen_address = &listen_args.listen_address.unwrap_or_else(|| {