diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..6105c25
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,4 @@
+*.lagda.md linguist-language=Agda
+*.lagda.md linguist-detectable=true
+
+*.css linguist-detectable=false