diff --git a/crates/post3-server/migrations/20260226000001_initial.sql b/crates/post3-server/migrations/20260226000001_initial.sql
new file mode 100644
index 0000000..a8d65fd
--- /dev/null
+++ b/crates/post3-server/migrations/20260226000001_initial.sql
@@ -0,0 +1,37 @@
+CREATE TABLE buckets (
+    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name        TEXT NOT NULL,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE UNIQUE INDEX idx_buckets_name ON buckets (name);
+
+CREATE TABLE objects (
+    id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    bucket_id     UUID NOT NULL REFERENCES buckets(id) ON DELETE CASCADE,
+    key           TEXT NOT NULL,
+    size          BIGINT NOT NULL,
+    etag          TEXT NOT NULL,
+    content_type  TEXT NOT NULL DEFAULT 'application/octet-stream',
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE UNIQUE INDEX idx_objects_bucket_key ON objects (bucket_id, key);
+CREATE INDEX idx_objects_key_prefix ON objects (bucket_id, key text_pattern_ops);
+
+CREATE TABLE object_metadata (
+    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    object_id   UUID NOT NULL REFERENCES objects(id) ON DELETE CASCADE,
+    meta_key    TEXT NOT NULL,
+    meta_value  TEXT NOT NULL
+);
+CREATE UNIQUE INDEX idx_metadata_object_key ON object_metadata (object_id, meta_key);
+CREATE INDEX idx_metadata_object_id ON object_metadata (object_id);
+
+CREATE TABLE blocks (
+    id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    object_id     UUID NOT NULL REFERENCES objects(id) ON DELETE CASCADE,
+    block_index   INT NOT NULL,
+    data          BYTEA NOT NULL,
+    block_size    INT NOT NULL
+);
+CREATE UNIQUE INDEX idx_blocks_object_index ON blocks (object_id, block_index);
+CREATE INDEX idx_blocks_object_id ON blocks (object_id);
diff --git a/crates/post3-server/migrations/20260227000001_multipart_uploads.sql b/crates/post3-server/migrations/20260227000001_multipart_uploads.sql
new file mode 100644
index 0000000..6d01d0d
--- /dev/null
+++ b/crates/post3-server/migrations/20260227000001_multipart_uploads.sql
@@ -0,0 +1,29 @@
+CREATE TABLE multipart_uploads (
+    id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    bucket_id    UUID NOT NULL REFERENCES buckets(id) ON DELETE CASCADE,
+    key          TEXT NOT NULL,
+    upload_id    TEXT NOT NULL,
+    content_type TEXT NOT NULL DEFAULT 'application/octet-stream',
+    created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE UNIQUE INDEX idx_multipart_upload_id ON multipart_uploads (upload_id);
+CREATE INDEX idx_multipart_bucket ON multipart_uploads (bucket_id);
+
+CREATE TABLE multipart_upload_metadata (
+    id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    upload_id  UUID NOT NULL REFERENCES multipart_uploads(id) ON DELETE CASCADE,
+    meta_key   TEXT NOT NULL,
+    meta_value TEXT NOT NULL
+);
+CREATE UNIQUE INDEX idx_mp_meta_key ON multipart_upload_metadata (upload_id, meta_key);
+
+CREATE TABLE upload_parts (
+    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    upload_id   UUID NOT NULL REFERENCES multipart_uploads(id) ON DELETE CASCADE,
+    part_number INT NOT NULL,
+    data        BYTEA NOT NULL,
+    size        BIGINT NOT NULL,
+    etag        TEXT NOT NULL,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE UNIQUE INDEX idx_upload_parts_num ON upload_parts (upload_id, part_number);
diff --git a/crates/post3-server/src/cli.rs b/crates/post3-server/src/cli.rs
index 9a2713e..14206f0 100644
--- a/crates/post3-server/src/cli.rs
+++ b/crates/post3-server/src/cli.rs
@@ -29,7 +29,7 @@ pub async fn execute() -> anyhow::Result<()> {
                     std::env::var("DATABASE_URL").context("DATABASE_URL not set")?;
                 let pool = PgPool::connect(&database_url).await?;
 
-                post3::MIGRATOR.run(&pool).await?;
+                sqlx::migrate!("./migrations").run(&pool).await?;
 
                 tracing::info!("database migrations applied");
 
diff --git a/crates/post3-server/tests/common/mod.rs b/crates/post3-server/tests/common/mod.rs
index ce300a0..85b96b0 100644
--- a/crates/post3-server/tests/common/mod.rs
+++ b/crates/post3-server/tests/common/mod.rs
@@ -44,7 +44,7 @@ impl TestServer {
             .unwrap();
 
         // Run migrations
-        post3::MIGRATOR.run(&pool).await.unwrap();
+        sqlx::migrate!("./migrations").run(&pool).await.unwrap();
 
         // Clean slate
         sqlx::query("DELETE FROM upload_parts").execute(&pool).await.unwrap();