diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000000000000000000000000000000000000..5f0cd02eb147c7a535b10fde17d5be9be121ca2a
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# See: https://docs.gitlab.com/ee/user/project/highlighting.html
+*.pl gitlab-language=prolog