diff --git a/.gitignore b/.gitignore
index 1c9dfcf..3383d9b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,9 @@
 .bash_history_local
 .envrc
 
+# Log from concept expansion
+/output/log.txt
+
 # generated part of documentation
 /docs/elements/*.md
 /docs/schema/*.yaml