diff --git a/CMakeLists.txt b/CMakeLists.txt
index a22c74e736..3c9aa48d67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -48,7 +48,7 @@ include(KDECompilerSettings NO_POLICY_SCOPE)
 include(ECMInstallIcons)
 include(ECMOptionalAddSubdirectory)
 
-add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0 -DQT_USE_QSTRINGBUILDER)
+add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0 -DQT_USE_QSTRINGBUILDER -DQT_NO_URL_CAST_FROM_STRING)
 
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
diff --git a/kcmkwin/common/effectmodel.cpp b/kcmkwin/common/effectmodel.cpp
index a6fbbab904..76615b373f 100644
--- a/kcmkwin/common/effectmodel.cpp
+++ b/kcmkwin/common/effectmodel.cpp
@@ -292,7 +292,7 @@ void EffectModel::loadJavascriptEffects(const KConfigGroup &kwinConfig)
         effect.enabledByDefault = plugin.isPluginEnabledByDefault();
         effect.enabledByDefaultFunction = false;
         effect.video = plugin.property(QStringLiteral("X-KWin-Video-Url")).toUrl();
-        effect.website = plugin.website();
+        effect.website = QUrl(plugin.website());
         effect.supported = true;
         effect.exclusiveGroup = plugin.property(QStringLiteral("X-KWin-Exclusive-Category")).toString();
         effect.internal = plugin.property(QStringLiteral("X-KWin-Internal")).toBool();
@@ -355,7 +355,7 @@ void EffectModel::loadPluginEffects(const KConfigGroup &kwinConfig, const KPlugi
             effect.enabledByDefaultFunction = d.value("enabledByDefaultMethod").toBool();
         }
 
-        effect.website = pluginEffect.website();
+        effect.website = QUrl(pluginEffect.website());
 
         const QString enabledKey = QStringLiteral("%1Enabled").arg(effect.serviceName);
         if (kwinConfig.hasKey(enabledKey)) {