diff --git a/requirements.txt b/requirements.txt
index db1cc99..3d554df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-numpy==1.11.2
+numpy==1.11.1
 vec-noise
 PyYAML==6.0.1
 gym==0.26.2