diff --git a/requirements.txt b/requirements.txt
index 4e54d98101b8452b99750e15a97f2908bde612fb..b8deb5c1e3813dd41fcbfbff9b2d267ffff50c64 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,5 +18,5 @@ pyyaml
 pytest==3.5.1
 xlsxwriter>=1.1.1
 pretrainedmodels
-sklearn
-gym
+scikit-learn
+gym==0.12.5