diff --git a/api/core.py b/api/core.py
index 94e5e65..4312db9 100644
--- a/api/core.py
+++ b/api/core.py
@@ -150,7 +150,7 @@ async def get_crypto_price(cryptocurrency: str) -> float:
     """Gets the price of a cryptocurrency using coinbase's API."""
 
     try:
-        async with aiofiles.open(os.path.join('cache', 'crypto_prices')) as f:
+        async with aiofiles.open(os.path.join('cache', 'crypto_prices.json')) as f:
             content = await f.read()
     except FileNotFoundError:
         cache = {}