diff --git a/.gitignore b/.gitignore
index 35854c7..91e04b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 **/__pycache__/*
 html/
-
+**/.*/
diff --git a/.gitmodules b/.gitmodules
index 6a957d5..f69d8fd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "tools/mmd"]
 	path = tools/mmd
 	url = https://github.com/fletcher/MultiMarkdown-6
+[submodule "tools/gifenc"]
+	path = tools/gifenc
+	url = https://github.com/lecram/gifenc
diff --git a/tools/gifenc b/tools/gifenc
new file mode 160000
index 0000000..87acd48
--- /dev/null
+++ b/tools/gifenc
@@ -0,0 +1 @@
+Subproject commit 87acd487dfa2f2a638eec751a1d6c2fff60822da