diff --git a/.gitmodules b/.gitmodules
index 4fd590e4..c5dc809f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -28,3 +28,8 @@
     url = https://github.com/upx/upx-vendor-zlib.git
     branch = upx-vendor
     shallow = true
+[submodule "vendor/zstd"]
+    path = vendor/zstd
+    url = https://github.com/upx/upx-vendor-zstd.git
+    branch = upx-vendor
+    shallow = true
diff --git a/vendor/zstd b/vendor/zstd
new file mode 160000
index 00000000..2eed0e3a
--- /dev/null
+++ b/vendor/zstd
@@ -0,0 +1 @@
+Subproject commit 2eed0e3abae48b4839a73fc85a4061ff5735a88a