diff --git a/requirements.txt b/requirements.txt
index 0b408101..c0aea103 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
 requests>=2.20.0
-tqdm==4.19.5
-pytest==3.4.1
-fix_yahoo_finance==0.0.21
-pandas_datareader==0.5.0
-numpy==1.12.1
-pandas==0.22.0
-scikit_learn==0.19.1
+tqdm>=4.19.5
+pytest>=3.4.1
+yfinance
+pandas_datareader>=0.5.0
+numpy>=1.12.1
+pandas>=0.22.0
+scikit_learn>=0.19.1