diff --git a/apps/opencs/view/world/datadisplaydelegate.cpp b/apps/opencs/view/world/datadisplaydelegate.cpp
index 713fedb4ba..c642a05e2b 100644
--- a/apps/opencs/view/world/datadisplaydelegate.cpp
+++ b/apps/opencs/view/world/datadisplaydelegate.cpp
@@ -71,7 +71,7 @@ bool CSVWorld::DataDisplayDelegate::eventFilter(QObject* target, QEvent* event)
         QColor themeColor = QApplication::palette().text().color();
         if (themeColor != mPixmapsColor)
         {
-            mPixmapsColor = themeColor;
+            mPixmapsColor = std::move(themeColor);
 
             buildPixmaps();
         }
diff --git a/apps/opencs/view/world/scriptsubview.cpp b/apps/opencs/view/world/scriptsubview.cpp
index 793f2e58c1..aa6890904d 100644
--- a/apps/opencs/view/world/scriptsubview.cpp
+++ b/apps/opencs/view/world/scriptsubview.cpp
@@ -212,7 +212,7 @@ void CSVWorld::ScriptSubView::useHint(const std::string& hint)
     if (hint.empty())
         return;
 
-    unsigned line = 0, column = 0;
+    int line = 0, column = 0;
     char c;
     std::istringstream stream(hint.c_str() + 1);
     switch (hint[0])
@@ -222,8 +222,8 @@ void CSVWorld::ScriptSubView::useHint(const std::string& hint)
         {
             QModelIndex index = mModel->getModelIndex(getUniversalId().getId(), mColumn);
             QString source = mModel->data(index).toString();
-            unsigned stringSize = source.length();
-            unsigned pos, dummy;
+            int stringSize = static_cast<int>(source.length());
+            int pos, dummy;
             if (!(stream >> c >> dummy >> pos))
                 return;
 
@@ -234,7 +234,7 @@ void CSVWorld::ScriptSubView::useHint(const std::string& hint)
                 pos = stringSize;
             }
 
-            for (unsigned i = 0; i <= pos; ++i)
+            for (int i = 0; i <= pos; ++i)
             {
                 if (source[i] == '\n')
                 {
diff --git a/components/misc/scalableicon.cpp b/components/misc/scalableicon.cpp
index 0b30eaf2ab..b3f4304557 100644
--- a/components/misc/scalableicon.cpp
+++ b/components/misc/scalableicon.cpp
@@ -36,7 +36,12 @@ namespace Misc
             return QIcon();
 
         QFile iconFile(fileName);
-        iconFile.open(QIODevice::ReadOnly);
+        if (!iconFile.open(QIODevice::ReadOnly))
+        {
+            qDebug() << "Failed to open icon file:" << fileName;
+            return QIcon();
+        }
+
         auto content = iconFile.readAll();
         if (!content.startsWith("<?xml"))
             return QIcon(fileName);
diff --git a/components/platform/application.cpp b/components/platform/application.cpp
index 336872101a..190887fa50 100644
--- a/components/platform/application.cpp
+++ b/components/platform/application.cpp
@@ -43,7 +43,12 @@ namespace Platform
                 setStyle("windows");
 
                 QFile file(getStyleSheetPath());
-                file.open(QIODevice::ReadOnly);
+                if (!file.open(QIODevice::ReadOnly))
+                {
+                    qDebug() << "Failed to open style sheet file:" << getStyleSheetPath();
+                    return;
+                }
+
                 setStyleSheet(file.readAll());
             }
         }
@@ -60,7 +65,12 @@ namespace Platform
             setStyle("windows");
 
             QFile file(getStyleSheetPath());
-            file.open(QIODevice::ReadOnly);
+            if (!file.open(QIODevice::ReadOnly))
+            {
+                qDebug() << "Failed to open style sheet file:" << getStyleSheetPath();
+                return;
+            }
+
             setStyleSheet(file.readAll());
         }
         else