diff --git a/Cargo.toml b/Cargo.toml
index 54a79f98..639df37d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "special"
 version = "0.11.0"
+edition = "2021"
 license = "Apache-2.0 OR MIT"
 authors = [
     "Abhishek Chanda <abhishek.becs@gmail.com>",
diff --git a/src/beta.rs b/src/beta.rs
index 9a7bb528..8c84606c 100644
--- a/src/beta.rs
+++ b/src/beta.rs
@@ -2,8 +2,8 @@
 #![allow(unstable_name_collisions)]
 
 #[allow(unused_imports)]
-use primitive::Primitive;
-use Gamma;
+use crate::primitive::Primitive;
+use crate::Gamma;
 
 /// Beta functions.
 pub trait Beta {
diff --git a/src/error.rs b/src/error.rs
index 1ee5ab23..24b1df19 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,4 +1,4 @@
-use primitive::Primitive;
+use crate::primitive::Primitive;
 
 /// Error functions.
 pub trait Error {
diff --git a/src/gamma.rs b/src/gamma.rs
index c834db26..ea06539e 100644
--- a/src/gamma.rs
+++ b/src/gamma.rs
@@ -1,6 +1,6 @@
 #![allow(unstable_name_collisions)]
 
-use primitive::Primitive;
+use crate::primitive::Primitive;
 
 /// Gamma functions.
 pub trait Gamma