diff --git a/CHANGES.md b/CHANGES.md
index 35f7b64ba..b77c3e05a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,11 @@
+1.10.0 / 2019/12/17
+===================
+
+* [added] shouldHaveBeenCalled evaluation happens later so un-stubbed calls don't throw (@elvetemedve)
+* [added] methods can now be doubled case-insensitively to match PHP semantics (@michalbundyra)
+* [fixed] reduced memory usage by optimising CachedDoubler (@DonCallisto)
+* [fixed] removed fatal error nesting level when comparing large objects (@scroach) 
+
 1.9.0 / 2019/10/03
 ==================
 
diff --git a/composer.json b/composer.json
index 07d1c4b92..d54ef7adf 100644
--- a/composer.json
+++ b/composer.json
@@ -44,7 +44,7 @@
 
     "extra": {
         "branch-alias": {
-            "dev-master": "1.8.x-dev"
+            "dev-master": "1.10.x-dev"
         }
     }
 }