diff --git a/ArcdpsLogManager/CHANGELOG.md b/ArcdpsLogManager/CHANGELOG.md
index 166aa87e..5582acd8 100644
--- a/ArcdpsLogManager/CHANGELOG.md
+++ b/ArcdpsLogManager/CHANGELOG.md
@@ -9,6 +9,7 @@ This is the full changelog of the arcdps Log Manager.
 - Added Temple of Febe CM detection
 
 #### Fixes
+- Fixed Cosmic Observatory success detection (since CM release)
 - Fixed a very rare Harvest Temple false failure
 - Fixed missing icons for Cosmic Observatory and Temple of Febe