diff --git a/.gitmodules b/.gitmodules
index 59dc115..9925c7e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -119,3 +119,6 @@
 [submodule "2021/jaspervdj"]
 	path = 2021/jaspervdj
 	url = https://github.com/jaspervdj/advent-of-code
+[submodule "2021/niknetniko"]
+	path = 2021/niknetniko
+	url = https://github.com/niknetniko/AdventOfCode.git
diff --git a/2021/niknetniko b/2021/niknetniko
new file mode 160000
index 0000000..339924c
--- /dev/null
+++ b/2021/niknetniko
@@ -0,0 +1 @@
+Subproject commit 339924c85e8fbae4d6a2a5c666f5f537800fd0ca
diff --git a/README.md b/README.md
index dbe4722..ea2629a 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@
 | redfast00      | https://github.com/redfast00/aoc2021               | Python      |
 | Jasper 2.0     | https://github.com/JasperJanin/advent-of-code-2021 | Kotlin      |
 | jaspervdj      | https://github.com/jaspervdj/advent-of-code        | Haskell     |
+| niknetniko     | https://github.com/niknetniko/AdventOfCode         | Elixir      |
 
 
 * repo clonen: