diff --git a/.chezmoiexternal.toml b/.chezmoiexternal.toml
new file mode 100644
index 0000000..6df5d05
--- /dev/null
+++ b/.chezmoiexternal.toml
@@ -0,0 +1,4 @@
+[".tmux/plugins/tpm"]
+    type = "git-repo"
+    url = "https://github.com/tmux-plugins/tpm"
+    refreshPeriod = "168h"