diff --git a/src/lib.rs b/src/lib.rs
index a6802b7..597c46b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,3 +10,6 @@ impl ToCli for u128 {
     type CliVariant = u128;
 }
 
+impl ToCli for u64 {
+    type CliVariant = u64;
+}