diff --git a/Cargo.toml b/Cargo.toml
index f5cc72a..7210b7b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ license = "MIT"
 
 [dependencies]
 petgraph = "^0.4"
-nom = "^2"
+nom = "^4"
 lazy_static = "^0.2"
 fnv = "^1"
 parking_lot = "^0.4"
diff --git a/src/fdo_magic/mod.rs b/src/fdo_magic/mod.rs
index 3a1bee4..5325a5c 100644
--- a/src/fdo_magic/mod.rs
+++ b/src/fdo_magic/mod.rs
@@ -237,10 +237,10 @@ pub mod ruleset {
        }
     
     pub fn from_u8(b: &[u8]) -> Result<FnvHashMap<MIME, DiGraph<super::MagicRule, u32>>, String> {
-        let tuplevec = from_u8_to_tuple_vec(b).to_result().map_err(|e| e.to_string())?;;
+        let tuplevec = from_u8_to_tuple_vec(b).map_err(|e| e.to_string())?;
         let mut res = FnvHashMap::<MIME, DiGraph<super::MagicRule, u32>>::default();
         
-        for x in tuplevec {
+        for x in tuplevec.1 {
             res.insert(x.0, gen_graph(x.1));
         }