diff --git a/setup.py b/setup.py
index bd683ce..a21e40c 100644
--- a/setup.py
+++ b/setup.py
@@ -34,8 +34,8 @@
         "IPy",
         "python-dateutil",
         "requests>=2.7.0",
-        "ripe.atlas.cousteau==1.4.*",
-        "ripe.atlas.sagan==1.2.*",
+        "ripe.atlas.cousteau>=1.4,<2",
+        "ripe.atlas.sagan>=1.2,<2",
         "tzlocal",
         "pyyaml",
         "pyOpenSSL>=0.13",