diff --git a/setup.cfg b/setup.cfg
index 0c86a56c..0d4b0597 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -48,6 +48,7 @@ zip_safe = True
 include_package_data = True
 install_requires =
         SpiNNUtilities == 1!7.3.1
+        typing_extensions
 
 [options.packages.find]
 include =