diff --git a/crates/binstalk/src/manifests/cargo_toml_binstall/package_formats.rs b/crates/binstalk/src/manifests/cargo_toml_binstall/package_formats.rs
index 30b16704..056cc8f7 100644
--- a/crates/binstalk/src/manifests/cargo_toml_binstall/package_formats.rs
+++ b/crates/binstalk/src/manifests/cargo_toml_binstall/package_formats.rs
@@ -6,6 +6,7 @@ use strum_macros::{Display, EnumIter, EnumString};
     Debug, Display, Copy, Clone, Eq, PartialEq, Serialize, Deserialize, EnumString, EnumIter,
 )]
 #[serde(rename_all = "snake_case")]
+#[strum(ascii_case_insensitive)]
 pub enum PkgFmt {
     /// Download format is TAR (uncompressed)
     Tar,