diff --git a/xExtension-CustomCSS/extension.php b/xExtension-CustomCSS/extension.php
index 856eeb1..1061f23 100644
--- a/xExtension-CustomCSS/extension.php
+++ b/xExtension-CustomCSS/extension.php
@@ -30,7 +30,7 @@ class CustomCSSExtension extends Minz_Extension {
 			$tmpPath = explode(EXTENSIONS_PATH . '/', $filepath);
 			$this->permission_problem = $tmpPath[1];
 		} else if (Minz_Request::isPost()) {
-			$css_rules = html_entity_decode(Minz_Request::param('css-rules', ''));
+			$css_rules = html_entity_decode(Minz_Request::paramString('css-rules'));
 			file_put_contents($filepath, $css_rules);
 		}
 
diff --git a/xExtension-CustomJS/extension.php b/xExtension-CustomJS/extension.php
index 91604b6..9f86ea5 100644
--- a/xExtension-CustomJS/extension.php
+++ b/xExtension-CustomJS/extension.php
@@ -30,7 +30,7 @@ class CustomJSExtension extends Minz_Extension {
 			$tmpPath = explode(EXTENSIONS_PATH . '/', $filepath);
 			$this->permission_problem = $tmpPath[1];
 		} else if (Minz_Request::isPost()) {
-			$js_rules = html_entity_decode(Minz_Request::param('js-rules', ''));
+			$js_rules = html_entity_decode(Minz_Request::paramString('js-rules'));
 			file_put_contents($filepath, $js_rules);
 		}
 
diff --git a/xExtension-ImageProxy/extension.php b/xExtension-ImageProxy/extension.php
index f2cc09a..73bc013 100644
--- a/xExtension-ImageProxy/extension.php
+++ b/xExtension-ImageProxy/extension.php
@@ -54,12 +54,12 @@ class ImageProxyExtension extends Minz_Extension {
 		$this->registerTranslates();
 
 		if (Minz_Request::isPost()) {
-			FreshRSS_Context::$user_conf->image_proxy_url = Minz_Request::param('image_proxy_url', self::PROXY_URL, true);
-			FreshRSS_Context::$user_conf->image_proxy_scheme_http = Minz_Request::param('image_proxy_scheme_http', '');
-			FreshRSS_Context::$user_conf->image_proxy_scheme_https = Minz_Request::param('image_proxy_scheme_https', '');
-			FreshRSS_Context::$user_conf->image_proxy_scheme_default = Minz_Request::param('image_proxy_scheme_default', self::SCHEME_DEFAULT);
-			FreshRSS_Context::$user_conf->image_proxy_scheme_include = Minz_Request::param('image_proxy_scheme_include', '');
-			FreshRSS_Context::$user_conf->image_proxy_url_encode = Minz_Request::param('image_proxy_url_encode', '');
+			FreshRSS_Context::$user_conf->image_proxy_url = Minz_Request::paramString('image_proxy_url', true) ?: self::PROXY_URL;
+			FreshRSS_Context::$user_conf->image_proxy_scheme_http = Minz_Request::paramString('image_proxy_scheme_http');
+			FreshRSS_Context::$user_conf->image_proxy_scheme_https = Minz_Request::paramString('image_proxy_scheme_https');
+			FreshRSS_Context::$user_conf->image_proxy_scheme_default = Minz_Request::paramString('image_proxy_scheme_default') ?: self::SCHEME_DEFAULT;
+			FreshRSS_Context::$user_conf->image_proxy_scheme_include = Minz_Request::paramString('image_proxy_scheme_include');
+			FreshRSS_Context::$user_conf->image_proxy_url_encode = Minz_Request::paramString('image_proxy_url_encode');
 			FreshRSS_Context::$user_conf->save();
 		}
 	}