diff --git a/README.md b/README.md
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+++ b/README.md
@@ -44,7 +44,8 @@ It also provides a standalone tool if you want to use your library outside of Fr
 
 ### Prerequisites
 
-Better Tool Library (BTL) is compatible with FreeCAD 0.19, 0.21, and 0.22.
+- Better Tool Library (BTL) is compatible with FreeCAD 0.19, 0.21, and 0.22.
+- If you installed FreeCAD from source, you may also need to install the [Python requirements](requirements.txt). If you are using the Appimage this step is not necessary, as BTL has no requirements that are not already included in the Appimage.
 
 ### Installation via the FreeCAD addon manager