diff --git a/android/app/proguard-rules.pro b/android/app/proguard-rules.pro
new file mode 100644
index 0000000..77023c9
--- /dev/null
+++ b/android/app/proguard-rules.pro
@@ -0,0 +1 @@
+-keep class com.builttoroam.devicecalendar.** { *; }
\ No newline at end of file
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index 2d375d8..c432814 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -1,8 +1,13 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.READ_CALENDAR" />
+    <uses-permission android:name="android.permission.WRITE_CALENDAR" />
+
     <application
         android:label="flutter_calendar_events"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
diff --git a/ios/Runner/Info.plist b/ios/Runner/Info.plist
index 543ebe5..0ec130e 100644
--- a/ios/Runner/Info.plist
+++ b/ios/Runner/Info.plist
@@ -47,5 +47,9 @@
 	<true/>
 	<key>UIApplicationSupportsIndirectInputEvents</key>
 	<true/>
+	<key>NSCalendarsUsageDescription</key>
+    <string>Access most functions for calendar viewing and editing.</string>
+    <key>NSContactsUsageDescription</key>
+    <string>Access contacts for event attendee editing.</string>
 </dict>
 </plist>
diff --git a/pubspec.yaml b/pubspec.yaml
index 20e687a..548ad9e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -36,6 +36,10 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
   intl: ^0.18.1
+  device_calendar:
+    git:
+      url: https://github.com/builttoroam/device_calendar.git
+      ref: 4.3.1
 
 dev_dependencies:
   flutter_test: