diff --git a/snappymail/v/0.0.0/app/libraries/snappymail/gpg/base.php b/snappymail/v/0.0.0/app/libraries/snappymail/gpg/base.php
index 2766e92f2..794aa9735 100644
--- a/snappymail/v/0.0.0/app/libraries/snappymail/gpg/base.php
+++ b/snappymail/v/0.0.0/app/libraries/snappymail/gpg/base.php
@@ -437,7 +437,7 @@ abstract class Base
 //		echo \shell_exec('gpg-agent --daemon --homedir $home 2>&1');
 	}
 
-	protected function getPassphrase($key): string
+	protected function getPassphrase(string $key): string
 	{
 		$passphrase  = '';
 		$keyIdLength = \strlen($key);
diff --git a/snappymail/v/0.0.0/app/libraries/snappymail/gpg/smime.php b/snappymail/v/0.0.0/app/libraries/snappymail/gpg/smime.php
index f7877f141..bbba86b59 100644
--- a/snappymail/v/0.0.0/app/libraries/snappymail/gpg/smime.php
+++ b/snappymail/v/0.0.0/app/libraries/snappymail/gpg/smime.php
@@ -1015,7 +1015,7 @@ class SMIME extends Base
 		];
 	}
 
-	protected function getPassphrase($key)
+	protected function getPassphrase(string $key): string
 	{
 		$passphrase  = '';
 		$keyIdLength = \strlen($key);