diff --git a/Pipfile b/Pipfile
index 55b63a9..6ea7019 100644
--- a/Pipfile
+++ b/Pipfile
@@ -48,6 +48,8 @@ CacheControl = "==0.12.6"
 Cycler = "==0.10.0"
 Pillow = "==8.1.0"
 mongoengine = "*"
+kaleido = "*"
+plotly = "*"
 
 [dev-packages]
 
diff --git a/yfi.py b/yfi.py
index f759333..ca94b4a 100644
--- a/yfi.py
+++ b/yfi.py
@@ -19,7 +19,7 @@ def stock_history(ticker, timespan="6mo", interval="1d"):
     if not stock_exists(ticker):
         return False
 
-    return yf.Ticker(stock).history("6mo", interval="1d", prepost=True)
+    return yf.Ticker(ticker).history("6mo", interval="1d", prepost=True)
 
 
 def get_current_price(ticker):