diff --git a/launch.sh b/launch.sh
index 799b92f6..d3263f79 100755
--- a/launch.sh
+++ b/launch.sh
@@ -1,4 +1,4 @@
 #!/usr/bin/env sh
 
-exec python3 src/poezio.py "$@"
+exec python3 -OO src/poezio.py "$@"