diff --git a/Cargo.toml b/Cargo.toml
index 486e4da11e..4f37b41229 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,3 +8,4 @@ edition = "2018"
 
 [dependencies]
 xxhrs = { version = "2.0.0", features = [] } #"random_entropy"] }
+thiserror = "1.0"
diff --git a/src/inputs/bytes.rs b/src/inputs/bytes.rs
index 6bdd19456e..3ced8e4015 100644
--- a/src/inputs/bytes.rs
+++ b/src/inputs/bytes.rs
@@ -1,7 +1,8 @@
-use crate::inputs::Input;
-
 use std::io::Error;
 
+use crate::AflError;
+use crate::inputs::Input;
+
 #[derive(Clone, Debug, Default)]
 pub struct BytesInput {
     bytes: Vec<u8>,
@@ -9,10 +10,10 @@ pub struct BytesInput {
 
 impl Input for BytesInput {
 
-    fn serialize(&self) -> Result<&[u8], Error> {
+    fn serialize(&self) -> Result<&[u8], AflError> {
         Ok(&self.bytes)
     }
-    fn deserialize(&mut self, buf: &[u8]) -> Result<(), Error> {
+    fn deserialize(&mut self, buf: &[u8]) -> Result<(), AflError> {
         self.bytes.truncate(0);
         self.bytes.extend_from_slice(buf);
         Ok(())
diff --git a/src/inputs/mod.rs b/src/inputs/mod.rs
index f365f5ad5e..3583907086 100644
--- a/src/inputs/mod.rs
+++ b/src/inputs/mod.rs
@@ -5,15 +5,17 @@ use std::fs::File;
 use std::io::Write;
 use std::io::Read;
 
+use crate::AflError;
+
 pub trait Input {
 
-    fn to_file(&self, path: &str) -> Result<(), Error> {
+    fn to_file(&self, path: &str) -> Result<(), AflError> {
         let mut file = File::create(path)?;
         file.write_all(self.serialize()?)?;
         Ok(())
     }
 
-    fn from_file(&mut self, path: &str) -> Result<(), Error> {
+    fn from_file(&mut self, path: &str) -> Result<(), AflError> {
         let mut file = File::create(path)?;
         let mut buf = vec![];
         file.read_to_end(&mut buf)?;
@@ -21,8 +23,8 @@ pub trait Input {
         Ok(())
     }
 
-    fn serialize(&self) -> Result<&[u8], Error>;
+    fn serialize(&self) -> Result<&[u8], AflError>;
 
-    fn deserialize(&mut self, buf: &[u8]) -> Result<(), Error>;
+    fn deserialize(&mut self, buf: &[u8]) -> Result<(), AflError>;
 
 }
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 11e96aff18..dcea1eeb23 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,7 @@
+use std::io;
+use thiserror::Error;
+
+pub mod corpus;
 pub mod engines;
 pub mod executors;
 pub mod feedbacks;
@@ -7,6 +11,19 @@ pub mod mutators;
 pub mod stages;
 pub mod utils;
 
+#[derive(Error, Debug)]
+pub enum AflError {
+    #[error("Error in Serialization: `{0}`")]
+    Serialize(String),
+    #[error("File IO failed")]
+    File(#[from] io::Error),
+    #[error("Key `{0}` not in Corpus")]
+    KeyNotFound(String),
+    #[error("Unknown error")]
+    Unknown,
+}
+
+
 #[cfg(test)]
 mod tests {
     #[test]
diff --git a/src/main.rs b/src/main.rs
deleted file mode 100644
index e50d703d48..0000000000
--- a/src/main.rs
+++ /dev/null
@@ -1,12 +0,0 @@
-pub mod engines;
-pub mod executors;
-pub mod feedbacks;
-pub mod inputs;
-pub mod monitors;
-pub mod mutators;
-pub mod stages;
-pub mod utils;
-
-fn main() {
-    println!("Hello, world!");
-}