diff --git a/doc/reference/clutter/clutter.toml.in b/doc/reference/clutter/clutter.toml.in
index e56b78570..2270b0b3e 100644
--- a/doc/reference/clutter/clutter.toml.in
+++ b/doc/reference/clutter/clutter.toml.in
@@ -17,7 +17,7 @@ search_index = true
   docs_url = "https://docs.gtk.org/gobject/"
 
   [dependencies."cairo-1.0"]
-  name = "Cairo"
+  name = "cairo"
   description = "A 2D graphics library with support for multiple output devices"
   docs_url = "https://www.cairographics.org/manual/"
 
diff --git a/doc/reference/cogl/cogl.toml.in b/doc/reference/cogl/cogl.toml.in
index 2eba52a91..756e90072 100644
--- a/doc/reference/cogl/cogl.toml.in
+++ b/doc/reference/cogl/cogl.toml.in
@@ -22,7 +22,7 @@ search_index = true
   docs_url = "https://ebassi.github.io/graphene/docs"
 
   [dependencies."cairo-1.0"]
-  name = "Cairo"
+  name = "cairo"
   description = "A 2D graphics library with support for multiple output devices"
   docs_url = "https://www.cairographics.org/manual/"