diff --git a/digitaler-filter-cocotb/.gitignore b/digitaler-filter-cocotb/.gitignore
index 180c0d1..dc4fcf0 100644
--- a/digitaler-filter-cocotb/.gitignore
+++ b/digitaler-filter-cocotb/.gitignore
@@ -1,3 +1,4 @@
+__pycache__/
 *swp
 *vcd
 results.xml