diff --git a/CHANGELOG b/CHANGELOG
index 678ec79c2bb462b18a22985b0c431b927f9ad45b..bf6aa4b61e576b1f0d3fafff4fe03eacc6bae0c6 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -57,4 +57,8 @@ Version 1.2
 Version 1.3
     -Fixed a bug related to calibration mode
     -Added ZODB data storage
-        -Integrated with zmq_plugin
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+        -Integrated with zmq_plugin
+
+Version 1.3.1
+    -Fixed electrochem modes broken when database added
+    -Make metadata keys optional.
\ No newline at end of file