diff --git a/Cargo.lock b/Cargo.lock
index d5c0b78..265a1cd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -18,7 +18,7 @@ dependencies = [
 
 [[package]]
 name = "acridotheres"
-version = "0.4.0"
+version = "0.4.1"
 dependencies = [
  "acr",
  "chrono",
diff --git a/Cargo.toml b/Cargo.toml
index 8197b0e..121f5c6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = 'acridotheres'
-version = '0.4.0'
+version = '0.4.1'
 edition = '2021'
 description = "Acridotheres Core Library"
 license = "MIT"
diff --git a/src/formats/auto.rs b/src/formats/auto.rs
index 4db50ee..fe71563 100644
--- a/src/formats/auto.rs
+++ b/src/formats/auto.rs
@@ -19,3 +19,11 @@ pub fn detect(
 ) -> Result<Format> {
     Err(Error::new(ErrorKind::Other, "Failed to detect format"))
 }
+
+pub fn from_str(s: &str) -> Option<Format> {
+    use Format::*;
+    match s {
+        "zip" => Some(Zip),
+        _ => None,
+    }
+}