diff --git a/lib/supabase.ts b/lib/supabase.ts
index ff32ad32..61927afd 100644
--- a/lib/supabase.ts
+++ b/lib/supabase.ts
@@ -166,6 +166,35 @@ export interface Database {
           indexed_at?: string;
         };
       };
+      ratings: {
+        Row: {
+          id: number;
+          storyline_id: number;
+          rater_address: string;
+          rating: number;
+          comment: string | null;
+          created_at: string;
+          updated_at: string;
+        };
+        Insert: {
+          id?: never;
+          storyline_id: number;
+          rater_address: string;
+          rating: number;
+          comment?: string | null;
+          created_at?: string;
+          updated_at?: string;
+        };
+        Update: {
+          id?: never;
+          storyline_id?: number;
+          rater_address?: string;
+          rating?: number;
+          comment?: string | null;
+          created_at?: string;
+          updated_at?: string;
+        };
+      };
     };
   };
 }
@@ -174,3 +203,4 @@ export interface Database {
 export type Storyline = Database["public"]["Tables"]["storylines"]["Row"];
 export type Plot = Database["public"]["Tables"]["plots"]["Row"];
 export type Donation = Database["public"]["Tables"]["donations"]["Row"];
+export type Rating = Database["public"]["Tables"]["ratings"]["Row"];
diff --git a/supabase/migrations/00005_ratings.sql b/supabase/migrations/00005_ratings.sql
new file mode 100644
index 00000000..d7af25f9
--- /dev/null
+++ b/supabase/migrations/00005_ratings.sql
@@ -0,0 +1,19 @@
+-- Ratings table: one rating per user per storyline (upsert pattern)
+-- Public read, no public write (writes via service role only)
+
+CREATE TABLE ratings (
+  id          BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+  storyline_id BIGINT NOT NULL REFERENCES storylines(storyline_id),
+  rater_address TEXT NOT NULL,
+  rating      SMALLINT NOT NULL CHECK (rating >= 1 AND rating <= 5),
+  comment     TEXT,
+  created_at  TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at  TIMESTAMPTZ NOT NULL DEFAULT now(),
+  UNIQUE (storyline_id, rater_address)
+);
+
+CREATE INDEX idx_ratings_storyline ON ratings (storyline_id);
+
+ALTER TABLE ratings ENABLE ROW LEVEL SECURITY;
+
+CREATE POLICY "Public read" ON ratings FOR SELECT USING (true);