diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringLruCache.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringLruCache.kt
index a72c1061d..2a54236dc 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringLruCache.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringLruCache.kt
@@ -1,6 +1,6 @@
 package org.koitharu.kotatsu.core.cache
 
-import androidx.collection.SieveCache
+import org.koitharu.kotatsu.core.util.SynchronizedSieveCache
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import java.util.concurrent.TimeUnit
 import org.koitharu.kotatsu.core.cache.MemoryContentCache.Key as CacheKey
@@ -11,9 +11,8 @@ class ExpiringLruCache<T>(
 	private val timeUnit: TimeUnit,
 ) {
 
-	private val cache = SieveCache<CacheKey, ExpiringValue<T>>(maxSize)
+	private val cache = SynchronizedSieveCache<CacheKey, ExpiringValue<T>>(maxSize)
 
-	@Synchronized
 	operator fun get(key: CacheKey): T? {
 		val value = cache[key] ?: return null
 		if (value.isExpired) {
@@ -24,27 +23,21 @@ class ExpiringLruCache<T>(
 
 	operator fun set(key: CacheKey, value: T) {
 		val value = ExpiringValue(value, lifetime, timeUnit)
-		synchronized(this) {
-			cache.put(key, value)
-		}
+		cache.put(key, value)
 	}
 
-	@Synchronized
 	fun clear() {
 		cache.evictAll()
 	}
 
-	@Synchronized
 	fun trimToSize(size: Int) {
 		cache.trimToSize(size)
 	}
 
-	@Synchronized
 	fun remove(key: CacheKey) {
 		cache.remove(key)
 	}
 
-	@Synchronized
 	fun removeAll(source: MangaSource) {
 		cache.removeIf { key, _ -> key.source == source }
 	}
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/util/SynchronizedSieveCache.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/util/SynchronizedSieveCache.kt
new file mode 100644
index 000000000..09b10e494
--- /dev/null
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/util/SynchronizedSieveCache.kt
@@ -0,0 +1,36 @@
+package org.koitharu.kotatsu.core.util
+
+import androidx.collection.SieveCache
+
+class SynchronizedSieveCache<K : Any, V : Any>(
+	private val delegate: SieveCache<K, V>,
+) {
+
+	constructor(maxSize: Int) : this(SieveCache<K, V>(maxSize))
+
+	private val lock = Any()
+
+	operator fun get(key: K): V? = synchronized(lock) {
+		delegate[key]
+	}
+
+	fun put(key: K, value: V): V? = synchronized(lock) {
+		delegate.put(key, value)
+	}
+
+	fun remove(key: K) = synchronized(lock) {
+		delegate.remove(key)
+	}
+
+	fun evictAll() = synchronized(lock) {
+		delegate.evictAll()
+	}
+
+	fun trimToSize(maxSize: Int) = synchronized(lock) {
+		delegate.trimToSize(maxSize)
+	}
+
+	fun removeIf(predicate: (K, V) -> Boolean) = synchronized(lock) {
+		delegate.removeIf(predicate)
+	}
+}
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/reader/domain/EdgeDetector.kt b/app/src/main/kotlin/org/koitharu/kotatsu/reader/domain/EdgeDetector.kt
index 76cb60e57..7b6c34de1 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/reader/domain/EdgeDetector.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/reader/domain/EdgeDetector.kt
@@ -6,7 +6,6 @@ import android.graphics.Color
 import android.graphics.Point
 import android.graphics.Rect
 import androidx.annotation.ColorInt
-import androidx.collection.SieveCache
 import androidx.core.graphics.alpha
 import androidx.core.graphics.blue
 import androidx.core.graphics.get
@@ -23,13 +22,14 @@ import kotlinx.coroutines.runInterruptible
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withContext
+import org.koitharu.kotatsu.core.util.SynchronizedSieveCache
 import org.koitharu.kotatsu.core.util.ext.use
 import kotlin.math.abs
 
 class EdgeDetector(private val context: Context) {
 
 	private val mutex = Mutex()
-	private val cache = SieveCache<ImageSource, Rect>(CACHE_SIZE)
+	private val cache = SynchronizedSieveCache<ImageSource, Rect>(CACHE_SIZE)
 
 	suspend fun getBounds(imageSource: ImageSource): Rect? {
 		cache[imageSource]?.let { rect ->