diff --git a/README.md b/README.md
index b92cbc17b..fa88c9f85 100644
--- a/README.md
+++ b/README.md
@@ -111,6 +111,9 @@ The detailed description can be found
 
 ## Changes
 
+### 3.0.40
+- Fix bug with weighted vs unweighted in pairwise effect calculation
+
 ### 3.0.39
 - Remove cube response deepcopy due to a performance issue
 
diff --git a/src/cr/cube/__init__.py b/src/cr/cube/__init__.py
index cfdc54b66..992ce3972 100644
--- a/src/cr/cube/__init__.py
+++ b/src/cr/cube/__init__.py
@@ -2,4 +2,4 @@
 
 """Initialization module for crunch-cube package."""
 
-__version__ = "3.0.39"
+__version__ = "3.0.40"