diff --git a/.gitmodules b/.gitmodules
index a735097e5..3ff1268e8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,4 +3,4 @@
 	url = https://github.com/slidewiki/custom-semantic-ui.git
 [submodule "custom_modules/reveal.js"]
 	path = custom_modules/reveal.js
-	url = https://github.com/slidewiki/reveal.js
+	url = https://github.com/slidewiki/reveal.js.git
diff --git a/custom_modules/reveal.js b/custom_modules/reveal.js
new file mode 160000
index 000000000..a1f8f7c2c
--- /dev/null
+++ b/custom_modules/reveal.js
@@ -0,0 +1 @@
+Subproject commit a1f8f7c2c15c640b36107a6e4185955e9c584bee