diff --git a/.gitignore b/.gitignore
index adb2341..58e124b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,6 @@ android/captures/
 .DS_Store
 Thumbs.db
 /archive
+
+# claude code
+.claude/
diff --git a/android/app/build.gradle.kts b/android/app/build.gradle.kts
index b4cc5b2..87878e1 100644
--- a/android/app/build.gradle.kts
+++ b/android/app/build.gradle.kts
@@ -14,13 +14,17 @@ android {
         applicationId = "me.hgsky.synq"
         minSdk = 31
         targetSdk = 36
-        versionCode = 1
-        versionName = "0.1.0"
+        versionCode = 2
+        versionName = "1.0.1"
     }
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
         }
     }
 
diff --git a/android/app/proguard-rules.pro b/android/app/proguard-rules.pro
new file mode 100644
index 0000000..897e065
--- /dev/null
+++ b/android/app/proguard-rules.pro
@@ -0,0 +1,16 @@
+# Keep Room entities and DAOs
+-keep class me.hgsky.synq.data.db.** { *; }
+
+# Keep Retrofit/OkHttp
+-dontwarn okhttp3.**
+-keep class okhttp3.** { *; }
+
+# Keep kotlinx.serialization
+-keepattributes *Annotation*, InnerClasses
+-dontnote kotlinx.serialization.AnnotationsKt
+-keepclassmembers class kotlinx.serialization.json.** { *** Companion; }
+-keepclasseswithmembers class **$$serializer { *; }
+-keepclassmembers @kotlinx.serialization.Serializable class ** {
+    *** Companion;
+    *** serializer(...);
+}