CHANGELOG.md in dry-monitor-0.3.0 vs CHANGELOG.md in dry-monitor-0.3.1

@@ -1,4 +1,10 @@
+# v0.3.1 2019-06-18
+
+### Fixed
+
+* Uninitialized constant `Dry::Monitor::Notifications::EMPTY_HASH` when no payload given (@mensfeld)
+
 # v0.3.0 2019-01-29
 
 ### Fixed
 
 * cannot load such file -- rack/utils (mensfeld)