diff --git a/apps/encryption/lib/Crypto/Crypt.php b/apps/encryption/lib/Crypto/Crypt.php
index 090ca6184d..4d5c20ea75 100644
--- a/apps/encryption/lib/Crypto/Crypt.php
+++ b/apps/encryption/lib/Crypto/Crypt.php
@@ -560,7 +560,7 @@ class Crypt {
 		$signaturePosition = strpos($meta, '00sig00');
 
 		// enforce signature for the new 'CTR' ciphers
-		if ($signaturePosition === false && strpos(strtolower($cipher), 'ctr') !== false) {
+		if ($signaturePosition === false && stripos($cipher, 'ctr') !== false) {
 			throw new GenericEncryptionException('Missing Signature', $this->l->t('Missing Signature'));
 		}
 
diff --git a/apps/workflowengine/lib/Controller/RequestTime.php b/apps/workflowengine/lib/Controller/RequestTime.php
index dd0efa89b9..1a07ca20a4 100644
--- a/apps/workflowengine/lib/Controller/RequestTime.php
+++ b/apps/workflowengine/lib/Controller/RequestTime.php
@@ -37,7 +37,7 @@ class RequestTime extends Controller {
 
 		if ($search !== '') {
 			$timezones = array_filter($timezones, function ($timezone) use ($search) {
-				return strpos(strtolower($timezone), strtolower($search)) !== false;
+				return stripos($timezone, $search) !== false;
 			});
 		}