diff --git a/requirements.txt b/requirements.txt
index 35a0541..37285e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,6 +10,6 @@ bioc==1.1.dev3
 pystanforddependencies==0.3.1
 bllipparser==2016.9.11
 pymetamap==0.1
-JPype1>=0.6.3
+JPype1==0.6.3
 pathlib2==2.3.3
 numpy==1.15.4
\ No newline at end of file