diff --git a/ipserv.py b/ipserv.py
index 810c66d..f892ebd 100644
--- a/ipserv.py
+++ b/ipserv.py
@@ -1,10 +1,12 @@
 import requests
 import json
 import logging
+import time
 from flask import Flask, request
 
 app = Flask(__name__)
 logging.basicConfig(level=logging.INFO)
+cache = {}
 
 
 @app.get("/")
@@ -13,6 +15,14 @@ def ip():
         ip = request.headers["X-Forwarded-For"]
     else:
         ip = request.remote_addr
+
+    if ip in cache:
+        data, timestamp = cache[ip]
+        if time.time() - timestamp < 3600:
+            logging.info("cache hit for %s", ip)
+            return data, 200
+        logging.info("cache expired for %s", ip)
+
     logging.info("looking up IP info for %s", ip)
     try:
         response = requests.get(
@@ -44,4 +54,5 @@ def ip():
     data.pop("legalese", None)
     data.pop("source", None)
     data.pop("brexitRequired", None)
+    cache[ip] = [data, time.time()]
     return data, response.status_code