diff --git a/__pkginfo__.py b/__pkginfo__.py
index 72659671..a48a2bdb 100644
--- a/__pkginfo__.py
+++ b/__pkginfo__.py
@@ -37,8 +37,8 @@ entry_points={
         'pydisassemble=uncompyle6.bin.pydisassemble:main',
     ]}
 ftp_url            = None
-install_requires   = ['spark-parser >= 1.4.0',
-                      'xdis >= 3.2.0']
+install_requires   = ['spark-parser >= 1.4.0, < 1.5.0',
+                      'xdis >= 3.2.0, < 3.3.0']
 license            = 'MIT'
 mailing_list       = 'python-debugger@googlegroups.com'
 modname            = 'uncompyle6'