diff --git a/www/lib/CoreLibs/Convert/Byte.php b/www/lib/CoreLibs/Convert/Byte.php
index ebec727a..b0d05ece 100644
--- a/www/lib/CoreLibs/Convert/Byte.php
+++ b/www/lib/CoreLibs/Convert/Byte.php
@@ -37,7 +37,7 @@ class Byte
 	 *                                 BYTE_FORMAT_ADJUST: sprintf adjusted two 2 decimals
 	 *                                 BYTE_FORMAT_SI: use 1000 instead of 1024
 	 * @return string                  converted byte number (float) with suffix
-	 * @throws \Exception               1: no valid flag set
+	 * @throws \InvalidArgumentException 1: no valid flag set
 	 */
 	public static function humanReadableByteFormat(string|int|float $bytes, int $flags = 0): string
 	{
@@ -63,7 +63,7 @@ class Byte
 				$si = false;
 			}
 			if ($flags > 7) {
-				throw new \Exception("Invalid flags parameter: $flags", 1);
+				throw new \InvalidArgumentException("Invalid flags parameter: $flags", 1);
 			}
 
 			// si or normal
@@ -119,7 +119,7 @@ class Byte
 	 * @param  int              $flags  bitwise flag with use space turned on
 	 *                                  BYTE_FORMAT_SI: use 1000 instead of 1024
 	 * @return string|int|float         converted value or original value
-	 * @throws \Exception                1: no valid flag set
+	 * @throws \InvalidArgumentException 1: no valid flag set
 	 */
 	public static function stringByteFormat(string|int|float $number, int $flags = 0): string|int|float
 	{
@@ -130,7 +130,7 @@ class Byte
 			$si = false;
 		}
 		if ($flags != 0 && $flags != 4) {
-			throw new \Exception("Invalid flags parameter: $flags", 1);
+			throw new \InvalidArgumentException("Invalid flags parameter: $flags", 1);
 		}
 		// matches in regex
 		$matches = [];
diff --git a/www/lib/CoreLibs/Output/Image.php b/www/lib/CoreLibs/Output/Image.php
index 897e6495..4114494e 100644
--- a/www/lib/CoreLibs/Output/Image.php
+++ b/www/lib/CoreLibs/Output/Image.php
@@ -78,7 +78,7 @@ class Image
 				if (!empty($dummy) && file_exists($filename) && is_file($filename)) {
 					$return_data = $filename;
 				} else {
-					throw new \Exception('Could not set dummy return file: ' . $dummy . ' in ' . $filename);
+					throw new \RuntimeException('Could not set dummy return file: ' . $dummy . ' in ' . $filename);
 				}
 			} else {
 				$return_data = $dummy;