diff --git a/.gitmodules b/.gitmodules
index 55bac9d..6373249 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -55,3 +55,6 @@
 [submodule "redfast00"]
 	path = redfast00
 	url = https://github.com/redfast00/aoc2020
+[submodule "Charlotte"]
+	path = Charlotte
+	url = https://github.com/charvp/aoc2020
diff --git a/Charlotte b/Charlotte
new file mode 160000
index 0000000..9974157
--- /dev/null
+++ b/Charlotte
@@ -0,0 +1 @@
+Subproject commit 99741578bc43460fe7c93a74da40134295f39540
diff --git a/README.md b/README.md
index 1cdb8c7..8f07083 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@
 | Silvius        | https://github.com/ajuvercr/aoc_2020              | Haskell    |
 | Bram           | https://github.com/bravdwal/aoc2020               | Perl       |
 | redfast00      | https://github.com/redfast00/aoc2020              | Python     |
+| Charlotte      | https://github.com/charvp/aoc2020                 | Nix        |
 
 * repo clonen: