diff --git a/polylan_submitter/animations/api.py b/polylan_submitter/animations/api.py
index 74dac23..32c4ec0 100644
--- a/polylan_submitter/animations/api.py
+++ b/polylan_submitter/animations/api.py
@@ -61,8 +61,14 @@ def results(request: HttpRequest) -> dict:
 
 
 @router.get("top-submissions", response=TournamentSubmissionsOut)
-def top_submissions(request: HttpRequest, limit: int = 5) -> TournamentSubmissionsOut:
+def top_submissions(request: HttpRequest, limit: int = 5) -> dict:
     """Get tournament top submissions for each puzzle. Only available when tournament is closed."""
+    cache_key = f"api:results:top_submissions:{limit}"
+    cached_data = cache.get(cache_key)
+
+    if cached_data is not None:
+        return cached_data
+
     collection = get_object_or_404(SteamCollection, is_active=True)
 
     # Only allow access when tournament is closed
@@ -70,15 +76,16 @@ def top_submissions(request: HttpRequest, limit: int = 5) -> TournamentSubmissio
         raise HttpError(403, "Tournament is still accepting submissions")
 
     # Get all puzzles
-    puzzles = SteamCollectionItem.objects.filter(collection=collection).order_by("order_index")
+    puzzles = SteamCollectionItem.objects.filter(collection=collection).order_by(
+        "order_index"
+    )
 
     # Build response
     submissions_list = []
     for puzzle in puzzles:
         # Get the top N responses for this puzzle (ranked by points, highest first)
         top_responses = (
-            PuzzleResponse.objects
-            .filter(puzzle=puzzle, needs_manual_validation=False)
+            PuzzleResponse.objects.filter(puzzle=puzzle, needs_manual_validation=False)
             .filter_user_best_response()
             .annotate_rank_points()
             .order_by("-rank_points")[:limit]
@@ -92,23 +99,30 @@ def top_submissions(request: HttpRequest, limit: int = 5) -> TournamentSubmissio
             response_files = [
                 WinnerFileOut(
                     file_url=file.file_url or "",
-                    original_filename=file.original_filename
+                    original_filename=file.original_filename,
                 )
                 for file in files
             ]
 
             # Calculate total coefficient
             total_coef = None
-            if puzzle.points_factor and response.final_cost is not None and response.final_cycles is not None and response.final_area is not None:
+            if (
+                puzzle.points_factor
+                and response.final_cost is not None
+                and response.final_cycles is not None
+                and response.final_area is not None
+            ):
                 total_coef = (
-                    puzzle.points_factor.cost * response.final_cost +
-                    puzzle.points_factor.cycles * response.final_cycles +
-                    puzzle.points_factor.area * response.final_area
+                    puzzle.points_factor.cost * response.final_cost
+                    + puzzle.points_factor.cycles * response.final_cycles
+                    + puzzle.points_factor.area * response.final_area
                 )
 
             submission_data = WinnerResponseOut(
                 user_id=response.submission.user.id if response.submission.user else 0,
-                username=response.submission.user.username if response.submission.user else "Anonymous",
+                username=response.submission.user.username
+                if response.submission.user
+                else "Anonymous",
                 final_cost=response.final_cost,
                 final_cycles=response.final_cycles,
                 final_area=response.final_area,
@@ -126,12 +140,20 @@ def top_submissions(request: HttpRequest, limit: int = 5) -> TournamentSubmissio
             )
         )
 
-    return TournamentSubmissionsOut(submissions=submissions_list)
+    data = {"submissions": submissions_list}
+    cache.set(f"api:results:top_submissions:{limit}", data, 300)
+    return data
 
 
 @router.get("puzzle-results", response=TournamentPuzzleResultsOut)
-def puzzle_results(request: HttpRequest, limit: int = 5) -> TournamentPuzzleResultsOut:
+def puzzle_results(request: HttpRequest, limit: int = 5) -> dict:
     """Get tournament results organized by puzzle with coefficients. Only available when tournament is closed."""
+    cache_key = f"api:results:puzzle_results:{limit}"
+    cached_data = cache.get(cache_key)
+
+    if cached_data is not None:
+        return cached_data
+
     collection = get_object_or_404(SteamCollection, is_active=True)
 
     # Only allow access when tournament is closed
@@ -139,15 +161,16 @@ def puzzle_results(request: HttpRequest, limit: int = 5) -> TournamentPuzzleResu
         raise HttpError(403, "Tournament is still accepting submissions")
 
     # Get all puzzles
-    puzzles = SteamCollectionItem.objects.filter(collection=collection).order_by("order_index")
+    puzzles = SteamCollectionItem.objects.filter(collection=collection).order_by(
+        "order_index"
+    )
 
     # Build response
     results_list = []
     for puzzle in puzzles:
         # Get the top N responses for this puzzle (ranked by points)
         top_responses = (
-            PuzzleResponse.objects
-            .filter(puzzle=puzzle, needs_manual_validation=False)
+            PuzzleResponse.objects.filter(puzzle=puzzle, needs_manual_validation=False)
             .filter_user_best_response()
             .annotate_rank_points()
             .order_by("-rank_points")[:limit]
@@ -161,24 +184,31 @@ def puzzle_results(request: HttpRequest, limit: int = 5) -> TournamentPuzzleResu
             response_files = [
                 WinnerFileOut(
                     file_url=file.file_url or "",
-                    original_filename=file.original_filename
+                    original_filename=file.original_filename,
                 )
                 for file in files
             ]
 
             # Calculate total coefficient
             total_coef = None
-            if puzzle.points_factor and response.final_cost is not None and response.final_cycles is not None and response.final_area is not None:
+            if (
+                puzzle.points_factor
+                and response.final_cost is not None
+                and response.final_cycles is not None
+                and response.final_area is not None
+            ):
                 total_coef = (
-                    puzzle.points_factor.cost * response.final_cost +
-                    puzzle.points_factor.cycles * response.final_cycles +
-                    puzzle.points_factor.area * response.final_area
+                    puzzle.points_factor.cost * response.final_cost
+                    + puzzle.points_factor.cycles * response.final_cycles
+                    + puzzle.points_factor.area * response.final_area
                 )
 
             submission_data = PuzzleSubmissionWithRankOut(
                 rank=rank,
                 user_id=response.submission.user.id if response.submission.user else 0,
-                username=response.submission.user.username if response.submission.user else "Anonymous",
+                username=response.submission.user.username
+                if response.submission.user
+                else "Anonymous",
                 final_cost=response.final_cost,
                 final_cycles=response.final_cycles,
                 final_area=response.final_area,
@@ -206,4 +236,6 @@ def puzzle_results(request: HttpRequest, limit: int = 5) -> TournamentPuzzleResu
             )
         )
 
-    return TournamentPuzzleResultsOut(results=results_list)
+    data = {"results": results_list}
+    cache.set(f"api:results:puzzle_results:{limit}", data, 300)
+    return data
diff --git a/polylan_submitter/submissions/migrations/0014_steamcollection_accepting_submissions.py b/polylan_submitter/submissions/migrations/0014_steamcollection_accepting_submissions.py
index 1003f2e..6d92af2 100644
--- a/polylan_submitter/submissions/migrations/0014_steamcollection_accepting_submissions.py
+++ b/polylan_submitter/submissions/migrations/0014_steamcollection_accepting_submissions.py
@@ -4,7 +4,6 @@ from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
-
     dependencies = [
         ("submissions", "0013_steamcollectionitem_points_value"),
     ]
diff --git a/polylan_submitter/submissions/schemas.py b/polylan_submitter/submissions/schemas.py
index 6032002..2ce691c 100644
--- a/polylan_submitter/submissions/schemas.py
+++ b/polylan_submitter/submissions/schemas.py
@@ -3,7 +3,13 @@ from typing import List, Optional
 from datetime import datetime
 from uuid import UUID
 
-from .models import Submission, PuzzleResponse, SubmissionFile, SteamCollectionItem, SteamCollection
+from .models import (
+    Submission,
+    PuzzleResponse,
+    SubmissionFile,
+    SteamCollectionItem,
+    SteamCollection,
+)
 
 
 # Input Schemas