diff --git a/.gitignore b/.gitignore
index 119d9f1..efefedf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 __pycache__/
 process_list.txt
 secrets
+repos.yml
diff --git a/install.py b/install.py
index 39cd7c2..356cae5 100755
--- a/install.py
+++ b/install.py
@@ -245,6 +245,15 @@ class Installer:
                 f"Are the packages really meant for {self.operating_system} systems?"
             )
 
+    def do_include(self, yml_file: str) -> None:
+        """Include an additional config file."""
+
+        yaml = YAML(typ="safe")
+        additional_conf = yaml.load(Path(yml_file).text())
+        programs = list(additional_conf.keys())
+        self.conf.update(additional_conf)
+        self.process(programs)
+
     def do_run(self, command: str, condition: str = "true") -> None:
         """Run a command."""
 
diff --git a/todo b/todo
index a7a7204..5b19c30 100644
--- a/todo
+++ b/todo
@@ -2,4 +2,3 @@ support multiple remotes in git clones
 add upstream to i3blocks-contrib repo
 remove sensitive information in source
 remove sensitive information in history : https://docs.github.com/en/github/authenticating-to-github/removing-sensitive-data-from-a-repository
-add 'input' or 'include' function for additional config file(s) -> use dict.update() with new config file loaded through yaml