diff --git a/server/src/main/kotlin/ir/armor/tachidesk/impl/Extension.kt b/server/src/main/kotlin/ir/armor/tachidesk/impl/Extension.kt
index 735cfecf..5432dbaa 100644
--- a/server/src/main/kotlin/ir/armor/tachidesk/impl/Extension.kt
+++ b/server/src/main/kotlin/ir/armor/tachidesk/impl/Extension.kt
@@ -87,7 +87,7 @@ object Extension {
             val pkgName = packageInfo.packageName
 
             if (!packageInfo.reqFeatures.orEmpty().any { it.name == EXTENSION_FEATURE }) {
-                throw Exception("This apk is not a tachiyomi extension")
+                throw Exception("This apk is not a Tachiyomi extension")
             }
 
             // Validate lib version
diff --git a/server/src/main/kotlin/ir/armor/tachidesk/impl/util/PackageTools.kt b/server/src/main/kotlin/ir/armor/tachidesk/impl/util/PackageTools.kt
index 205633c2..a2177dca 100644
--- a/server/src/main/kotlin/ir/armor/tachidesk/impl/util/PackageTools.kt
+++ b/server/src/main/kotlin/ir/armor/tachidesk/impl/util/PackageTools.kt
@@ -39,9 +39,9 @@ object PackageTools {
     const val LIB_VERSION_MIN = 1.2
     const val LIB_VERSION_MAX = 1.2
 
-    // inorichi's key
-    private const val officialSignature = "7ce04da7773d41b489f4693a366c36bcd0a11fc39b547168553c285bd7348e23"
-    var trustedSignatures = mutableSetOf<String>() + officialSignature
+    private const val officialSignature = "7ce04da7773d41b489f4693a366c36bcd0a11fc39b547168553c285bd7348e23" // inorichi's key
+    private const val unofficialSignature = "64feb21075ba97ebc9cc981243645b331595c111cef1b0d084236a0403b00581" // ArMor's key
+    var trustedSignatures = mutableSetOf<String>() + officialSignature + unofficialSignature
 
     /**
      * Convert dex to jar, a wrapper for the dex2jar library