diff --git a/requirements.txt b/requirements.txt
index 0308229f7..dbfffb0e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ tabulate==0.8.2
 coinmarketcap==5.0.3
 
 # Required for hyperopt
-scikit-optimize=0.5.2
+scikit-optimize==0.5.2
 
 # Required for plotting data
 #plotly==2.7.0