diff --git a/.gitmodules b/.gitmodules
index 1e764cd..fa048e0 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
-[submodule "docs/org-html-themes"]
-	path = docs/org-html-themes
-	url = https://github.com:fniessen/org-html-themes.git
 [submodule "python/examples"]
 	path = python/examples
 	url = git@github.com:TREX-CoE/trexio-tutorials.git
diff --git a/docs/org-html-themes b/docs/org-html-themes
deleted file mode 160000
index 39a8ce2..0000000
--- a/docs/org-html-themes
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 39a8ce24babbf55667e3f4be21e37c619f55f257