diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt
index a4c016260..e1520072f 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt
@@ -96,6 +96,7 @@ import org.mariotaku.microblog.library.mastodon.Mastodon
 import org.mariotaku.microblog.library.twitter.model.FriendshipUpdate
 import org.mariotaku.microblog.library.twitter.model.Paging
 import org.mariotaku.microblog.library.twitter.model.UserList
+import org.mariotaku.twidere.BuildConfig
 import org.mariotaku.twidere.Constants.*
 import org.mariotaku.twidere.R
 import org.mariotaku.twidere.activity.AccountSelectorActivity
@@ -1130,7 +1131,7 @@ class UserFragment : BaseFragment(), OnClickListener, OnLinkClickListener,
             return
         }
         val spec = pagerAdapter.get(viewPager.currentItem)
-        assert(spec.type != null)
+        if (BuildConfig.DEBUG && spec.type == null) { error("Assertion failed") }
         when (spec.type) {
             TAB_TYPE_STATUSES, TAB_TYPE_STATUSES_WITH_REPLIES -> {
                 actionBar.subtitle = resources.getQuantityString(R.plurals.N_statuses,
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt
index 8e82518b8..d828c5251 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt
@@ -31,6 +31,7 @@ import com.davemorrissey.labs.subscaleview.decoder.SkiaImageDecoder
 import org.mariotaku.ktextension.nextPowerOf2
 import org.mariotaku.mediaviewer.library.CacheDownloadLoader
 import org.mariotaku.mediaviewer.library.subsampleimageview.SubsampleImageViewerFragment
+import org.mariotaku.twidere.BuildConfig
 import org.mariotaku.twidere.TwidereConstants.*
 import org.mariotaku.twidere.activity.MediaViewerActivity
 import org.mariotaku.twidere.model.ParcelableMedia
@@ -96,7 +97,7 @@ class ImagePageFragment : SubsampleImageViewerFragment() {
     }
 
     override fun getImageSource(data: CacheDownloadLoader.Result): ImageSource {
-        assert(data.cacheUri != null)
+        if (BuildConfig.DEBUG && data.cacheUri == null) { error("Assertion failed") }
         if (data !is SizedResult) {
             return super.getImageSource(data)
         }
@@ -108,7 +109,7 @@ class ImagePageFragment : SubsampleImageViewerFragment() {
 
     override fun getPreviewImageSource(data: CacheDownloadLoader.Result): ImageSource? {
         if (data !is SizedResult) return null
-        assert(data.cacheUri != null)
+        if (BuildConfig.DEBUG && data.cacheUri == null) { error("Assertion failed") }
         return ImageSource.uri(UriUtils.appendQueryParameters(data.cacheUri, QUERY_PARAM_PREVIEW, true))
     }
 
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/menu/FavoriteItemProvider.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/menu/FavoriteItemProvider.kt
index 4c4bd3d77..c151b7b26 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/menu/FavoriteItemProvider.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/menu/FavoriteItemProvider.kt
@@ -29,6 +29,7 @@ import androidx.appcompat.widget.ActionMenuView
 import android.view.MenuItem
 import android.view.View
 import org.mariotaku.ktextension.weak
+import org.mariotaku.twidere.BuildConfig
 import org.mariotaku.twidere.extension.view.findItemView
 import org.mariotaku.twidere.graphic.like.LikeAnimationDrawable
 import org.mariotaku.twidere.graphic.like.LikeAnimationDrawable.Style
@@ -52,7 +53,7 @@ class FavoriteItemProvider(context: Context) : ActionProvider(context) {
     }
 
     fun init(menuBar: ActionMenuView, item: MenuItem) {
-        assert(MenuItemCompat.getActionProvider(item) === this)
+        if (BuildConfig.DEBUG && MenuItemCompat.getActionProvider(item) !== this) { error("Assertion failed") }
         val icon = ContextCompat.getDrawable(context, this.icon)
         val drawable = LikeAnimationDrawable(icon, defaultColor, activatedColor,
                 if (useStar) Style.FAVORITE else Style.LIKE)
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/menu/RetweetItemProvider.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/menu/RetweetItemProvider.kt
index 483694cfd..913a931ce 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/menu/RetweetItemProvider.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/menu/RetweetItemProvider.kt
@@ -24,6 +24,7 @@ import androidx.core.view.ActionProvider
 import androidx.core.view.MenuItemCompat
 import androidx.appcompat.widget.ActionMenuView
 import android.view.MenuItem
+import org.mariotaku.twidere.BuildConfig
 import org.mariotaku.twidere.extension.view.findItemView
 
 /**
@@ -35,7 +36,7 @@ class RetweetItemProvider(context: Context) : ActionProvider(context) {
     override fun onCreateActionView() = null
 
     fun init(menuBar: ActionMenuView, item: MenuItem) {
-        assert(MenuItemCompat.getActionProvider(item) === this)
+        if (BuildConfig.DEBUG && MenuItemCompat.getActionProvider(item) !== this) { error("Assertion failed") }
         val menuView = menuBar.findItemView(item)
         menuView?.setOnLongClickListener { longClickListener?.invoke() == true }
     }