diff --git a/.idea/misc.xml b/.idea/misc.xml
index cb150cf..8562ed5 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
diff --git a/agentkey.jks b/agentkey.jks
deleted file mode 100644
index c3ddb8e..0000000
Binary files a/agentkey.jks and /dev/null differ
diff --git a/app/agent_retention.jks b/app/agent_retention.jks
new file mode 100644
index 0000000..0b2b02f
Binary files /dev/null and b/app/agent_retention.jks differ
diff --git a/app/build.gradle b/app/build.gradle
index 6e29aa9..30c71c5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -6,6 +6,15 @@ android {
     namespace 'com.example.studyapp'
     compileSdk 35
 
+    signingConfigs {
+        release {
+            storeFile file('agent_retention.jks')
+            storePassword 'agent_retention'
+            keyAlias 'agent_retention'
+            keyPassword 'agent_retention'
+        }
+    }
+
     defaultConfig {
         applicationId "com.example.retention"
         minSdk 24
@@ -30,7 +39,8 @@ android {
 
     buildTypes {
         release {
-            minifyEnabled false
+            signingConfig signingConfigs.release
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
         debug {
diff --git a/new-release-key.jks b/new-release-key.jks
deleted file mode 100644
index 5e54d60..0000000
Binary files a/new-release-key.jks and /dev/null differ
diff --git a/your-release-key.jks b/your-release-key.jks
deleted file mode 100644
index 31321ef..0000000
Binary files a/your-release-key.jks and /dev/null differ