diff --git a/libconfig/Cargo.toml b/libconfig/Cargo.toml
index f6f983d..811e76c 100644
--- a/libconfig/Cargo.toml
+++ b/libconfig/Cargo.toml
@@ -12,6 +12,7 @@ log = "0.4"
 git = "https://github.com/rafalh/rust-fatfs"
 rev = "85f06e0"
 default-features = false
+features = ["alloc", "lfn"]
 
 [features]
 target_zc706 = []
diff --git a/szl/Cargo.toml b/szl/Cargo.toml
index fba9db9..b0d5fb8 100644
--- a/szl/Cargo.toml
+++ b/szl/Cargo.toml
@@ -27,3 +27,4 @@ libconfig = { path = "../libconfig" }
 git = "https://github.com/rafalh/rust-fatfs"
 rev = "85f06e0"
 default-features = false
+features = ["alloc", "lfn"]