diff --git a/README.md b/README.md
index 3717d68..7d010de 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,10 @@ pip install -r requirements.txt
 
 SHEET_ID = #FILLMEIN
 RANGE_NAME = #METOO
+
+[Cache]
+
+TIMEOUT = 10
 ```
 
 3. [Request a Google service account](https://console.cloud.google.com/iam-admin/serviceaccounts)
@@ -31,5 +35,4 @@ RANGE_NAME = #METOO
 
 ## TODO
 
-- Database caching: don't re-request google sheet data every time
 - Error handling: it shouldn't ever crash on user input
diff --git a/blokdata/app.py b/blokdata/app.py
index a4cdc04..5a37b6f 100644
--- a/blokdata/app.py
+++ b/blokdata/app.py
@@ -2,19 +2,31 @@ from .sheet_data import google_sheet_to_json
 
 from flask import Flask
 from flask_cors import CORS, cross_origin
+from flask_caching import Cache
+
+import configparser
+
+# Setup Flask app
 app = Flask(__name__)
+
+# Add CORS
 cors = CORS(app)
 app.config['CORS_HEADERS'] = 'Content-Type'
 
-import configparser
+# Add caching
+cache = Cache(app, config={'CACHE_TYPE': 'simple'})
+
+# Read the config file
 CONFIG = configparser.ConfigParser()
 CONFIG.read("config.ini")
 
 SPREADSHEET_ID = CONFIG["Google"]["SHEET_ID"]
 RANGE_NAME = CONFIG["Google"]["RANGE_NAME"]
+CACHE_TIMEOUT = int(CONFIG["Cache"]["TIMEOUT"])
 
 @app.route('/data.json')
 @cross_origin()
+@cache.cached(timeout=CACHE_TIMEOUT)
 def data_json():
     return google_sheet_to_json(SPREADSHEET_ID, RANGE_NAME)
 
diff --git a/requirements.txt b/requirements.txt
index b36bea2..74a1550 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,7 @@ certifi==2020.4.5.1
 chardet==3.0.4
 click==7.1.2
 Flask==1.1.2
+Flask-Caching==1.8.0
 Flask-Cors==3.0.8
 google-api-core==1.17.0
 google-api-python-client==1.8.2