diff --git a/.gitignore b/.gitignore
index 1688d7d4..8d751d70 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,3 @@
 svgnative/build/
 viewer/
 .vscode
-third_party/
\ No newline at end of file
diff --git a/third_party/cpp-base64 b/third_party/cpp-base64
new file mode 160000
index 00000000..6420804f
--- /dev/null
+++ b/third_party/cpp-base64
@@ -0,0 +1 @@
+Subproject commit 6420804f7ba10e8c3049c6e3b59ec88c88d808a6
diff --git a/third_party/stylesheet b/third_party/stylesheet
new file mode 160000
index 00000000..c81c4be1
--- /dev/null
+++ b/third_party/stylesheet
@@ -0,0 +1 @@
+Subproject commit c81c4be1195e47226b992e26050c3c99ae18510f