diff --git a/Cargo.toml b/Cargo.toml
index 53354d6..649f00b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@ name = "loot-condition-interpreter"
 version = "1.3.0"
 authors = ["Oliver Hamlet <oliver.hamlet@gmail.com>"]
 license = "MIT"
+edition = "2018"
 
 [dependencies]
 crc = "1.0.0"
diff --git a/ffi/Cargo.toml b/ffi/Cargo.toml
index c5d8564..f39c25f 100644
--- a/ffi/Cargo.toml
+++ b/ffi/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.3.0"
 authors = ["Oliver Hamlet <oliver.hamlet@gmail.com>"]
 license = "MIT"
 build = "build.rs"
+edition = "2018"
 
 [dependencies]
 loot-condition-interpreter = { path = ".." }
diff --git a/ffi/src/helpers.rs b/ffi/src/helpers.rs
index 9849d4a..333225a 100644
--- a/ffi/src/helpers.rs
+++ b/ffi/src/helpers.rs
@@ -5,8 +5,8 @@ use libc::{c_char, c_int, size_t};
 use loot_condition_interpreter::{Error, GameType};
 
 use super::ERROR_MESSAGE;
-use constants::*;
-use state::{plugin_crc, plugin_version};
+use crate::constants::*;
+use crate::state::{plugin_crc, plugin_version};
 
 pub fn error(code: c_int, message: &str) -> c_int {
     ERROR_MESSAGE.with(|f| {
diff --git a/ffi/src/state.rs b/ffi/src/state.rs
index 6d9dc57..890ddeb 100644
--- a/ffi/src/state.rs
+++ b/ffi/src/state.rs
@@ -6,8 +6,10 @@ use std::sync::RwLock;
 use libc::{c_char, c_int, size_t};
 use loot_condition_interpreter::State;
 
-use constants::*;
-use helpers::{error, map_game_type, map_plugin_crcs, map_plugin_versions, to_str, to_str_vec};
+use crate::constants::*;
+use crate::helpers::{
+    error, map_game_type, map_plugin_crcs, map_plugin_versions, to_str, to_str_vec,
+};
 
 #[allow(non_camel_case_types)]
 #[no_mangle]
diff --git a/src/function/eval.rs b/src/function/eval.rs
index 1b86f15..f1f075e 100644
--- a/src/function/eval.rs
+++ b/src/function/eval.rs
@@ -8,9 +8,8 @@ use crc::{crc32, Hasher32};
 use regex::Regex;
 
 use super::{ComparisonOperator, Function};
-use version::Version;
-use Error;
-use State;
+use crate::version::Version;
+use crate::{Error, State};
 
 fn add_extension(path: &Path, extension: &str) -> PathBuf {
     match path.extension() {
@@ -274,7 +273,7 @@ mod tests {
     use regex::RegexBuilder;
     use tempfile::tempdir;
 
-    use GameType;
+    use crate::GameType;
 
     fn state<T: Into<PathBuf>>(data_path: T) -> State {
         state_with_active_plugins(data_path, &[])
diff --git a/src/function/parse.rs b/src/function/parse.rs
index c0a22ba..1eda2a1 100644
--- a/src/function/parse.rs
+++ b/src/function/parse.rs
@@ -10,10 +10,8 @@ use nom::{Err, IResult};
 use regex::{Regex, RegexBuilder};
 
 use super::{ComparisonOperator, Function};
-use crate::{map_err, whitespace};
-use error::ParsingErrorKind;
-use ParsingError;
-use ParsingResult;
+use crate::error::ParsingErrorKind;
+use crate::{map_err, whitespace, ParsingError, ParsingResult};
 
 impl ComparisonOperator {
     pub fn parse(input: &str) -> IResult<&str, ComparisonOperator> {
diff --git a/src/lib.rs b/src/lib.rs
index 37ba4b7..9a3250f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,12 +1,3 @@
-extern crate crc;
-extern crate nom;
-extern crate pelite;
-extern crate regex;
-extern crate unicase;
-
-#[cfg(test)]
-extern crate tempfile;
-
 mod error;
 mod function;
 mod version;
diff --git a/src/version.rs b/src/version.rs
index 56d8974..24b9811 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -5,7 +5,7 @@ use pelite::resources::version_info::VersionInfo;
 use pelite::resources::{FindError, Resources};
 use pelite::FileMap;
 
-use error::Error;
+use crate::error::Error;
 
 const VERSION_INFO_RESOURCE_PATH: &str = "/16/1";