diff --git a/README.md b/README.md
index fbd6bb9..69ec4b8 100644
--- a/README.md
+++ b/README.md
@@ -225,18 +225,20 @@ All configuration is via environment variables:
 | `WTTR_CACHE_DIR` | `~/.cache/wttr` | Cache directory |
 | `WTTR_CACHE_SIZE` | `10000` | Max cached responses |
 | `WTTR_GEOLITE_PATH` | `~/.cache/wttr/GeoLite2-City.mmdb` | GeoIP database path |
+| `WTTR_GEOCACHE_FILE` | `~/.cache/wttr/geocache.json` | Location name cache |
 | `IP2LOCATION_API_KEY` | (none) | Optional IP geolocation fallback |
+| `IP2LOCATION_CACHE_FILE` | `~/.cache/wttr/ip2location.cache` | IP2Location cache file |
+| `METNO_TOS_IDENTIFYING_EMAIL` | (none) | Email for Met.no API identification |
 
 ## External Services
 
-### Required (No API Key)
+### Required
 - **Met.no Weather API** - Weather data provider (free, no registration)
   - Set METNO_TOS_IDENTIFYING_EMAIL to identify yourself to Met.No
-
-- **IP2Location.io** - Fallback IP geolocation
+- **IP2Location.io** - IP geolocation service
   - Sign up at https://www.ip2location.io/
   - Free tier: 30,000 requests/month
-  - Set via `IP2LOCATION_API_KEY` environment variable
+  - Set `IP2LOCATION_API_KEY` environment variable for higher limits
 
 ### Auto-Downloaded
 - **MaxMind GeoLite2 City** - IP geolocation database