diff --git a/README.md b/README.md
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 These PyQt examples teach you to create a desktop app with Python. Start with "[Hello World](src/01%20PyQt%20QLabel)" and work your way up to the [official PyQt demos](#official-pyqt-demos). You can use Windows, Mac or Linux.
 
-| <a href="src/01 PyQt QLabel"><img src="src/screenshots/pyqt-qlabel.png" alt="PyQt QLabel" width=100px></a> | <a href="src/02 PyQt Widgets"><img src="src/screenshots/pyqt-widgets.png" alt="PyQt widgets screenshot" width=200px></a> | <a href="src/03 QVBoxLayout PyQt5"><img src="src/screenshots/qvboxlayout-pyqt5.png" alt="QVBoxLayout PyQt5" width=100px></a> | <a href="src/04 PyQt Signals and Slots"><img src="src/04 PyQt Signals and Slots/pyqt-signals-and-slots.jpg" alt="PyQt Signals and Slots" width=170px></a> | <a href="src/05 Qt Designer Python"><img src="src/05 Qt Designer Python/qt-designer-windows.png" alt="Qt Designer Python" width=190px></a> |
+| <a href="src/01 PyQt QLabel"><img src="src/screenshots/pyqt-qlabel.png" alt="PyQt QLabel" width=100px></a> | <a href="src/02 PyQt Widgets"><img src="src/screenshots/pyqt-widgets.png" alt="PyQt widgets screenshot" width=200px></a> | <a href="src/03 QVBoxLayout PyQt5"><img src="src/screenshots/qvboxlayout-pyqt5.png" alt="QVBoxLayout PyQt5" width=100px></a> | <a href="src/04 PyQt Signals and Slots"><img src="src/screenshots/pyqt-signals-and-slots.jpg" alt="PyQt Signals and Slots" width=170px></a> | <a href="src/05 Qt Designer Python"><img src="src/05 Qt Designer Python/qt-designer-windows.png" alt="Qt Designer Python" width=190px></a> |
 | :--: | :--: | :--: | :--: | :--: |
 | <a href="src/01 PyQt QLabel">Hello World!</a> | <a href="src/02 PyQt Widgets">Common PyQt Widgets</a> | <a href="src/03 QVBoxLayout PyQt5">Layouts</a> | <a href="src/04 PyQt Signals and Slots">Signals and Slots</a> | <a href="src/04 Qt Designer Python">Qt Designer & Python</a> |
 
diff --git a/src/04 PyQt Signals and Slots/README.md b/src/04 PyQt Signals and Slots/README.md
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 PyQt Signals let you react to user input such as mouse clicks. A *slot* is a function that gets called when such an event occurs. The file [`main.py`](main.py) in this directory shows this in action: When the user clicks a button, a popup appears:
 
-<p align="center"><img src="pyqt-signals-and-slots.jpg" alt="PyQt Signals and Slots"></p>
+<p align="center"><img src="../screenshots/pyqt-signals-and-slots.jpg" alt="PyQt Signals and Slots"></p>
 
 The code begins in the usual way. First, we import PyQt5 and create a `QApplication`:
 
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