diff --git a/grammars.yml b/grammars.yml
index 264bc752..203c5a58 100644
--- a/grammars.yml
+++ b/grammars.yml
@@ -233,6 +233,8 @@ https://github.com/textmate/applescript.tmbundle:
 https://github.com/textmate/asp.tmbundle:
 - source.asp
 - text.html.asp
+https://github.com/textmate/bison.tmbundle:
+- source.bison
 https://github.com/textmate/c.tmbundle:
 - source.c
 - source.c++
diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 9ec037cd..9723ce4b 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -240,6 +240,12 @@ Befunge:
   extensions:
   - .befunge
 
+Bison:
+  type: programming
+  tm_scope: source.bison
+  extensions:
+  - .y
+
 BlitzBasic:
   type: programming
   aliases: