diff --git a/examples/demo.py b/examples/demo.py
index bbcce87..064dd53 100644
--- a/examples/demo.py
+++ b/examples/demo.py
@@ -1,12 +1,11 @@
 
 import os
 
-os.environ["ICONIFY_QTLIB"] = "PySide2"
 os.environ["ICONIFY_PATH"] = os.path.dirname(__file__) + "/icons"
 
-from PySide2 import QtCore, QtGui, QtWidgets
 
 import iconify as ico
+from iconify.qt import QtCore, QtGui, QtWidgets
 
 
 app = QtWidgets.QApplication([])
diff --git a/examples/modelViewUsage.py b/examples/modelViewUsage.py
index 471978f..9cc318f 100644
--- a/examples/modelViewUsage.py
+++ b/examples/modelViewUsage.py
@@ -2,12 +2,11 @@
 import os
 
 
-os.environ["ICONIFY_QTLIB"] = "PySide2"
 os.environ["ICONIFY_PATH"] = os.path.dirname(__file__) + "/icons"
 
 
 import iconify as ico
-from iconify.qt import QtCore, QtGui, QtWidgets, QtSvg
+from iconify.qt import QtCore, QtGui, QtSvg, QtWidgets
 
 
 
diff --git a/iconify/core.py b/iconify/core.py
index 07c88d2..d9f2384 100644
--- a/iconify/core.py
+++ b/iconify/core.py
@@ -299,11 +299,11 @@ def pixmap(self, size):
 
         if self._anim is not None:
             key = (
-                self._path, size, str(self._anim.__class__),
+                self._path, str(size), str(self._anim.__class__),
                 self._anim.frame(), color
             )  # type: PixmapCacheKey
         else:
-            key = (self._path, size, "", 0, color)
+            key = (self._path, str(size), "", 0, color)
 
         if key in self._pixmapCache:
             return self._pixmapCache[key]
@@ -324,17 +324,12 @@ def pixmap(self, size):
             painter.setTransform(xfm)
 
         self._renderer.render(painter)
-        painter.end()
 
         if self._color is not None:
-            # Use the alpha channel on a solid colour image
-            colorImage = QtGui.QImage(
-                size,
-                QtGui.QImage.Format_ARGB32_Premultiplied,
-            )
-            colorImage.fill(QtGui.QColor(self._color))
-            colorImage.setAlphaChannel(image.alphaChannel())
-            image = colorImage
+            painter.setCompositionMode(QtGui.QPainter.CompositionMode_SourceIn)
+            painter.fillRect(image.rect(), QtGui.QColor(self._color))
+
+        painter.end()
 
         pixmap = QtGui.QPixmap.fromImage(image)
         self._pixmapCache[key] = pixmap
diff --git a/iconify/qt.py b/iconify/qt.py
index 8c2e7a2..e62f42e 100644
--- a/iconify/qt.py
+++ b/iconify/qt.py
@@ -26,3 +26,6 @@
 
 if None in (QtCore, QtGui, QtSvg, QtWidgets, QtXml):
     raise ImportError(_IMPORT_ERROR_MESSAGE.format(qtlib))
+
+if qtlib == "PyQt5":
+    QtCore.Signal = QtCore.pyqtSignal