diff --git a/epistasis/__version__.py b/epistasis/__version__.py
index 364e7ba..98aac86 100644
--- a/epistasis/__version__.py
+++ b/epistasis/__version__.py
@@ -1 +1,3 @@
-__version__ = "0.6.4"
+VERSION = (0, 6, 5)
+
+__version__ = '.'.join(map(str, VERSION))
diff --git a/setup.py b/setup.py
index d19b7f1..0ae037c 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@
     "ipython",
     "ipywidgets",
     "scikit-learn",
-    "gpmap==0.4.1",
+    "gpmap>=0.4.2",
     "emcee"
 ]