diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 01f5a979..7cf9769d 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1348,6 +1348,7 @@ TeX:
   primary_extension: .tex
   extensions:
   - .aux
+  - .bib
   - .dtx
   - .ins
   - .ltx