diff --git a/run-mypy.sh b/run-mypy.sh
index 6896ff9a5cd1baad80ca2076244343e9ad3fa9f5..e867afdaf9cd9e8cf8a1286a8d941650408a772f 100755
--- a/run-mypy.sh
+++ b/run-mypy.sh
@@ -1,7 +1,6 @@
 #! /bin/bash
 
 mypy \
-  --fast-parser \
   --strict-optional \
   --ignore-missing-imports \
   --follow-imports=skip \