diff --git a/app/build.gradle b/app/build.gradle
index 0c4a0b7fd..c274c7ed9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -98,6 +98,7 @@ dependencies {
 
     // Modified dependencies
     compile 'com.github.inorichi:subsampling-scale-image-view:01e5385'
+    compile 'com.github.inorichi:tachimage:68cd311'
     compile 'com.github.inorichi:junrar-android:634c1f5'
 
     // Android support library
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 9fce41d19..1ac898d6a 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -7,6 +7,10 @@
 -keep class com.hippo.image.** { *; }
 -keep interface com.hippo.image.** { *; }
 
+# Extensions may require methods unused in the core app
+-keep class org.jsoup.** { *; }
+-keep class kotlin.** { *; }
+
 # OkHttp
 -dontwarn okhttp3.**
 -dontwarn okio.**