diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8513e69c..9640da50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,17 @@
 CHANGELOG
 ======
 
+* v0.5.5: Add `EventControlOperationPlugin` && Introduce format expression && Add 'passive mode' setting && Fix UI problem when requesting permission && Dev changes
+	* Add `EventControlOperationPlugin` to be able to change Events' status
+	* Introduce format expression for many user-input fields
+		* Current supported expressions are:
+			* `%DATE%` for current date (`yyyy-MM-DD`)
+			* `%TIME%` for current time (`HH-mm-ss`)
+	* Add 'passive mode' setting
+		* When setting to passive mode, Easer won't check the initial status, but would only listen to new events thereafter
+	* Fix unable to set enabled/disabled state for plugin views after requesting permission
+	* Dev change: simplify several plugins
+
 * v0.5.4: Restore the old definitions for inline Scenarios && Add `TcpTripEventPlugin` && Various changes
 	* Restore the old definitions of "repeatable" and "persistent" when using inline Scenarios
 		* They were overridden previously when introducing Scenario
diff --git a/app/build.gradle b/app/build.gradle
index 9e7adc41..a0c397bc 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,8 +7,8 @@ android {
         applicationId 'ryey.easer'
         minSdkVersion 15
         targetSdkVersion 23
-        versionCode 55
-        versionName "0.5.4"
+        versionCode 56
+        versionName "0.5.5"
 
         vectorDrawables.useSupportLibrary = true
 
diff --git a/docs/en/FEATURES.md b/docs/en/FEATURES.md
index f630d30c..83fd769a 100644
--- a/docs/en/FEATURES.md
+++ b/docs/en/FEATURES.md
@@ -34,4 +34,9 @@ Supported Features
 * Send SMS
 * Post Notifications
 * Set alarm
+* Change Event status
 
+### Misc
+* Formatting expression (supported in the fields of many Events/Operations)
+	* `%DATE%` - current date (`yyyy-MM-DD`)
+	* `%TIME%` - current time (`HH-mm-ss`)
diff --git a/docs/zh/FEATURES.md b/docs/zh/FEATURES.md
index 0f58ae72..1adbb0ce 100644
--- a/docs/zh/FEATURES.md
+++ b/docs/zh/FEATURES.md
@@ -34,4 +34,10 @@
 * 發送短信息
 * 發送通知
 * 設定鬧鐘
+* 控制事件狀態
+
+### 雜項
+* 格式化表達式（多數事件和動作的用戶輸入區均支持）
+	* `%DATE%` - 當前日期（`yyyy-MM-DD`）
+	* `%TIME%` - 當前時間（`HH-mm-ss`）