diff --git a/inspector/build.gradle.kts b/inspector/build.gradle.kts
index 20c9004..8555d25 100644
--- a/inspector/build.gradle.kts
+++ b/inspector/build.gradle.kts
@@ -40,7 +40,7 @@ sourceSets {
 }
 
 // should be bumped with each stable release
-val inspectorVersion = "v1.4.3"
+val inspectorVersion = "v1.4.4"
 
 // counts commit count on master
 val inspectorRevision = runCatching {
diff --git a/inspector/src/main/kotlin/eu/kanade/tachiyomi/animesource/UnmeteredSource.kt b/inspector/src/main/kotlin/eu/kanade/tachiyomi/animesource/UnmeteredSource.kt
new file mode 100644
index 0000000..840a223
--- /dev/null
+++ b/inspector/src/main/kotlin/eu/kanade/tachiyomi/animesource/UnmeteredSource.kt
@@ -0,0 +1,8 @@
+package eu.kanade.tachiyomi.animesource
+
+/**
+ * A source that explicitly doesn't require traffic considerations.
+ *
+ * This typically applies for self-hosted sources.
+ */
+interface UnmeteredSource
diff --git a/inspector/src/main/kotlin/inspector/Main.kt b/inspector/src/main/kotlin/inspector/Main.kt
index 55be0e5..03cd558 100644
--- a/inspector/src/main/kotlin/inspector/Main.kt
+++ b/inspector/src/main/kotlin/inspector/Main.kt
@@ -12,6 +12,9 @@ import eu.kanade.tachiyomi.App
 import eu.kanade.tachiyomi.animesource.online.AnimeHttpSource
 import inspector.util.AnimeExtension
 import io.github.oshai.kotlinlogging.KotlinLogging
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.coroutineScope
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
@@ -47,11 +50,15 @@ suspend fun main(args: Array<String>) {
 
     logger.info { "Found ${extensions.size} extensions" }
 
-    val extensionsInfo = extensions.associate {
-        logger.debug { "Installing $it" }
-        val (pkgName, sources) = AnimeExtension.installApk(tmpDir) { it.toFile() }
-        pkgName to sources.map(::SourceJson)
-    }
+    val extensionsInfo = coroutineScope {
+        extensions.map {
+            async {
+                logger.debug { "Installing $it" }
+                val (pkgName, sources) = AnimeExtension.installApk(tmpDir) { it.toFile() }
+                pkgName to sources.map(::SourceJson)
+            }
+        }.awaitAll()
+    }.toMap()
 
     File(outputPath).writeText(Json.encodeToString(extensionsInfo))
 }
diff --git a/inspector/src/main/kotlin/inspector/util/AnimeExtension.kt b/inspector/src/main/kotlin/inspector/util/AnimeExtension.kt
index 55a27b2..7504759 100644
--- a/inspector/src/main/kotlin/inspector/util/AnimeExtension.kt
+++ b/inspector/src/main/kotlin/inspector/util/AnimeExtension.kt
@@ -57,7 +57,7 @@ object AnimeExtension {
         dex2jar(apkFile, jarFile)
 
         // collect sources from the extension
-        return packageInfo.packageName to when (val instance = loadExtensionSources(jarFile.absolutePath, className)) {
+        return packageInfo.packageName to when (val instance = loadExtensionSources(jarFile, className)) {
             is AnimeSource -> listOf(instance).filterIsInstance<AnimeHttpSource>()
             is AnimeSourceFactory -> instance.createSources().filterIsInstance<AnimeHttpSource>()
             else -> throw RuntimeException("Unknown source class type! ${instance.javaClass}")
diff --git a/inspector/src/main/kotlin/inspector/util/PackageTools.kt b/inspector/src/main/kotlin/inspector/util/PackageTools.kt
index 198932e..afa38a4 100644
--- a/inspector/src/main/kotlin/inspector/util/PackageTools.kt
+++ b/inspector/src/main/kotlin/inspector/util/PackageTools.kt
@@ -21,7 +21,6 @@ import org.w3c.dom.Node
 import xyz.nulldev.androidcompat.pm.InstalledPackage.Companion.toList
 import xyz.nulldev.androidcompat.pm.toPackageInfo
 import java.io.File
-import java.net.URL
 import java.net.URLClassLoader
 import java.nio.file.Files
 import javax.xml.parsers.DocumentBuilderFactory
@@ -107,8 +106,8 @@ object PackageTools {
      * loads the extension main class called $className from the jar located at $jarPath
      * It may return an instance of AnimeHttpSource or AnimeSourceFactory depending on the extension.
      */
-    fun loadExtensionSources(jarPath: String, className: String): Any {
-        val classLoader = URLClassLoader(arrayOf<URL>(URL("file:$jarPath")))
+    fun loadExtensionSources(jarFile: File, className: String): Any {
+        val classLoader = URLClassLoader(arrayOf(jarFile.toURI().toURL()))
         val classToLoad = Class.forName(className, false, classLoader)
         return classToLoad.getDeclaredConstructor().newInstance()
     }