diff --git a/Cargo.toml b/Cargo.toml
index 147b7bd..12951c4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -47,6 +47,9 @@ experimental_write_impl = []
 features = ["alloc", "grab_spare_slice", "rustc_1_40", "serde"]
 rustdoc-args = ["--cfg","docs_rs"]
 
+[package.metadata.playground]
+features = ["alloc", "grab_spare_slice", "rustc_1_40", "serde"]
+
 [profile.test]
 opt-level = 3