diff --git a/.github/workflows/appimage.yml b/.github/workflows/appimage.yml
index 0c2f4c0f..7f2049fe 100644
--- a/.github/workflows/appimage.yml
+++ b/.github/workflows/appimage.yml
@@ -32,11 +32,11 @@ jobs:
           # install EnTT
           git clone https://github.com/skypjack/entt.git
           cd entt/build
-          cmake -DCMAKE_BUILD_TYPE=Release -DENTT_INSTALL=on ..
+          cmake -DCMAKE_POLICY_VERSION_MINIMUM=3.5 -DCMAKE_BUILD_TYPE=Release -DENTT_INSTALL=on ..
           sudo make install
           cd ../..
       - name: Configure
-        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Release -DVOXELENGINE_BUILD_APPDIR=1 -DVOXELENGINE_BUILD_TESTS=ON
+        run: cmake -S . -B build -DCMAKE_POLICY_VERSION_MINIMUM=3.5 -DCMAKE_BUILD_TYPE=Release -DVOXELENGINE_BUILD_APPDIR=1 -DVOXELENGINE_BUILD_TESTS=ON
       - name: Build
         run: cmake --build build -t install
       - name: Run tests
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f64a574e..6966e81f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.26)
+cmake_minimum_required(VERSION 3.5)
 project(VoxelEngine)
 
 set(CMAKE_CXX_STANDARD 17)
diff --git a/res/layouts/ingame_chat.xml b/res/layouts/ingame_chat.xml
index 45ad4749..e7c3a52c 100644
--- a/res/layouts/ingame_chat.xml
+++ b/res/layouts/ingame_chat.xml
@@ -1,5 +1,5 @@
 <panel size="300,0" margin="0,0,0,70" max-length='300' min-length='0'
-       size-func="gui.get_viewport()[1]/2,-1"
+       size-func="gui.get_viewport()[1]/2,0"
        padding="0"
        min-size="0"
        color="0"
diff --git a/src/graphics/ui/elements/Label.cpp b/src/graphics/ui/elements/Label.cpp
index fd8ac725..3339f307 100644
--- a/src/graphics/ui/elements/Label.cpp
+++ b/src/graphics/ui/elements/Label.cpp
@@ -51,7 +51,7 @@ void LabelCache::update(std::wstring_view text, bool multiline, bool wrap) {
             if (text[i] == L'\n') {
                 lines.push_back(LineScheme {i+1, false});
                 len = 0;
-            } else if (i > 0 && wrap && text[i+1] != L'\n') {
+            } else if (i > 0 && i+1 < text.length() && wrap && text[i+1] != L'\n') {
                 size_t width = font->calcWidth(text, i-len-1, i-(i-len)+2);
                 if (width >= wrapWidth) {
                     // starting a fake line
diff --git a/src/graphics/ui/elements/UINode.cpp b/src/graphics/ui/elements/UINode.cpp
index d975315a..ac59fbb5 100644
--- a/src/graphics/ui/elements/UINode.cpp
+++ b/src/graphics/ui/elements/UINode.cpp
@@ -160,9 +160,9 @@ CursorShape UINode::getCursor() const {
 
 glm::vec2 UINode::calcPos() const {
     if (parent) {
-        return pos + parent->calcPos() + parent->getContentOffset();
+        return glm::ivec2(pos + parent->calcPos() + parent->getContentOffset());
     }
-    return pos;
+    return glm::ivec2(pos);
 }
 
 void UINode::scrolled(int value) {
@@ -300,11 +300,13 @@ const std::string& UINode::getId() const {
 
 void UINode::reposition() {
     if (sizefunc) {
-        auto newSize = sizefunc();
-        auto defsize = newSize;
+        glm::ivec2 newSize = sizefunc();
+        glm::ivec2 defsize = newSize;
         if (parent) {
             defsize = parent->getSize();
         }
+        newSize.x = newSize.x == 0 ? size.x : newSize.x;
+        newSize.y = newSize.y == 0 ? size.y : newSize.y;
         setSize(
             {newSize.x < 0 ? defsize.x + (newSize.x + 1) : newSize.x,
              newSize.y < 0 ? defsize.y + (newSize.y + 1) : newSize.y}
diff --git a/src/window/Window.cpp b/src/window/Window.cpp
index 0c1cccee..4e68877f 100644
--- a/src/window/Window.cpp
+++ b/src/window/Window.cpp
@@ -6,6 +6,7 @@
 #include <chrono>
 #include <iostream>
 #include <thread>
+#include <unordered_set>
 
 #include "debug/Logger.hpp"
 #include "graphics/core/ImageData.hpp"
@@ -32,6 +33,7 @@ bool Window::fullscreen = false;
 CursorShape Window::cursor = CursorShape::ARROW;
 
 static util::ObjectsKeeper observers_keeper;
+static std::unordered_set<std::string> extensionsCache;
 
 static const char* gl_error_name(int error) {
     switch (error) {
@@ -223,8 +225,10 @@ int Window::initialize(DisplaySettings* settings) {
         }
     }
 
-    glEnable(GL_DEBUG_OUTPUT);
-    glDebugMessageCallback(gl_message_callback, 0);
+    if (isGlExtensionSupported("GL_KHR_debug")) {
+        glEnable(GL_DEBUG_OUTPUT);
+        glDebugMessageCallback(gl_message_callback, nullptr);
+    }
 
     glViewport(0, 0, width, height);
     glClearColor(0.0f, 0.0f, 0.0f, 1);
@@ -501,3 +505,29 @@ void Window::setIcon(const ImageData* image) {
         image->getData()};
     glfwSetWindowIcon(window, 1, &icon);
 }
+
+static void initGlExtensionsCache() {
+    if (!extensionsCache.empty()) {
+        return;
+    }
+
+    GLint numExtensions = 0;
+    glGetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);
+
+    for (GLint i = 0; i < numExtensions; ++i) {
+        const char *ext = reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i));
+        if (ext) {
+            extensionsCache.insert(ext);
+        }
+    }
+}
+
+bool Window::isGlExtensionSupported(const char *extension) {
+    if (!extension || !*extension) {
+        return false;
+    }
+
+    initGlExtensionsCache();
+
+    return extensionsCache.find(extension) != extensionsCache.end();
+}
diff --git a/src/window/Window.hpp b/src/window/Window.hpp
index 77fd7076..b81da395 100644
--- a/src/window/Window.hpp
+++ b/src/window/Window.hpp
@@ -24,6 +24,7 @@ class Window {
     static CursorShape cursor;
 
     static bool tryToMaximize(GLFWwindow* window, GLFWmonitor* monitor);
+    static bool isGlExtensionSupported(const char *extension);
 public:
     static int posX;
     static int posY;