diff --git a/.cargo/config b/.cargo/config.toml
similarity index 100%
rename from .cargo/config
rename to .cargo/config.toml
diff --git a/aarch64_qemuvirt/.cargo/config b/aarch64_qemuvirt/.cargo/config.toml
similarity index 100%
rename from aarch64_qemuvirt/.cargo/config
rename to aarch64_qemuvirt/.cargo/config.toml
diff --git a/riscv64_qemuvirt/.cargo/config b/riscv64_qemuvirt/.cargo/config.toml
similarity index 100%
rename from riscv64_qemuvirt/.cargo/config
rename to riscv64_qemuvirt/.cargo/config.toml