diff --git a/mypy.bash b/mypy.bash
index 03867adb..32d3c7b3 100755
--- a/mypy.bash
+++ b/mypy.bash
@@ -26,4 +26,4 @@ pacman="../PACMAN/pacman"
 spalloc="../spalloc/spalloc_client"
 fec="../SpiNNFrontEndCommon/spinn_front_end_common"
 
-mypy $utils $machine $man $pacman $spalloc $fec spinnaker_graph_front_end
+mypy --python-version 3.8 $utils $machine $man $pacman $spalloc $fec spinnaker_graph_front_end