diff --git a/mypy.bash b/mypy.bash
index 0a710764..d0d0eafc 100755
--- a/mypy.bash
+++ b/mypy.bash
@@ -21,4 +21,4 @@
 
 utils="../SpiNNUtils/spinn_utilities"
 
-mypy $utils spinn_machine
+mypy --python-version 3.8 $utils spinn_machine