diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6200bb5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,39 @@
+# Papulastic image format
+
+Simple image format encoded/decoder and metadata extractor from file format from some random documentation from school.
+
+## How to use
+
+Just compile the binary 💀
+
+```bash
+cargo build --release
+```
+
+Or if you wanna be menace to society you can run `cargo run` everytime.
+
+## Encoding
+
+```bash
+papulastic-image-format encode --input INPUT -o OUTPUT
+```
+
+You can also include initials and custom signature
+
+```bash
+papulastic-image-format encode -i INPUT -o OUTPUT --initials JK --signature FALSE-BLINDNESS
+```
+
+## Decoding
+
+```bash
+papulastic-image-format decode -i INPUT -o OUTPUT.png
+```
+
+## Metadata
+
+```bash
+papulastic-image-format metadata -i INPUT
+```
+
+This code is not perfect but the documentation isn't too so I can't be bothered.
diff --git a/src/cli.rs b/src/cli.rs
index 7729f9a..79abf9e 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -21,7 +21,7 @@ pub enum Commands {
         #[arg(short='a', long, default_value = "UN")]
         initials: String,
 
-        #[arg(short='a', long, default_value = "TRUEVISION-XFILE")]
+        #[arg(short='s', long, default_value = "TRUEVISION-XFILE")]
         signature: String,
     },
 
diff --git a/src/encoder.rs b/src/encoder.rs
index 1ad60de..fa9076a 100644
--- a/src/encoder.rs
+++ b/src/encoder.rs
@@ -7,8 +7,8 @@ use std::io::{BufWriter, Write};
 use std::path::Path;
 
 pub fn encode(input: &Path, output: &Path, initials: &str, signature: &str, origin: u8) -> Result<()> {
-    if signature.len() > 15 {
-        return Err(GfxError::Format("Signature longer than 15 bytes!".into()));
+    if signature.len() > 16 {
+        return Err(GfxError::Format("Signature longer than 16 bytes!".into()));
     }
 
     let img = image::open(input)?;