diff --git a/languages.toml b/languages.toml
index cdfd3a2d..d1ab92b6 100644
--- a/languages.toml
+++ b/languages.toml
@@ -1019,7 +1019,7 @@ source = { git = "https://github.com/Flakebi/tree-sitter-tablegen", rev = "568dd
 name = "markdown"
 scope = "source.md"
 injection-regex = "md|markdown"
-file-types = ["md", "markdown"]
+file-types = ["md", "markdown", "PULLREQ_EDITMSG"]
 roots = [".marksman.toml"]
 language-server = { command = "marksman", args=["server"] }
 indent = { tab-width = 2, unit = "  " }