Release v1.6.2 (#348)

diff --git a/CHANGELOG b/CHANGELOG
index 5309451..67a8509 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,12 @@
+v1.6.2
+  Version 1.6.2
+
+  Bugfix release
+
+  - Fixed a bug where application default credentials would still be used even
+    when a developerKey was specified. (#347)
+  - Official support for Python 3.5 and 3.6. (#341)
+ 
 v1.6.1
   Version 1.6.1