diff --git a/build.rs b/build.rs
index f49541f..9946336 100644
--- a/build.rs
+++ b/build.rs
@@ -1,8 +1,3 @@
-#[cfg(feature = "bindgen")]
-extern crate bindgen;
-#[cfg(feature = "cmake")]
-extern crate cmake;
-
 #[cfg(any(feature = "avdict", feature = "exif", feature = "ugoira"))]
 use std::env;
 #[cfg(any(feature = "avdict", feature = "exif", feature = "ugoira"))]
diff --git a/proc_macros/proc_macros.rs b/proc_macros/proc_macros.rs
index 4e070b7..4839244 100644
--- a/proc_macros/proc_macros.rs
+++ b/proc_macros/proc_macros.rs
@@ -1,7 +1,3 @@
-extern crate parse_duration;
-extern crate quote;
-extern crate syn;
-
 use proc_macro::TokenStream;
 use quote::quote;
 use syn::parse_macro_input;
diff --git a/src/main.rs b/src/main.rs
index 645e1ce..7cd8707 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,33 +1,5 @@
-extern crate atty;
-#[cfg(feature = "c_fixed_string")]
-extern crate c_fixed_string;
-extern crate chrono;
-extern crate dateparser;
-extern crate derive_more;
-#[cfg(feature = "flagset")]
-extern crate flagset;
-extern crate futures_util;
-extern crate http;
-extern crate http_content_range;
-extern crate indicatif;
-extern crate int_enum;
-extern crate itertools;
-extern crate json;
 #[macro_use]
 extern crate lazy_static;
-#[cfg(all(feature = "link-cplusplus", target_env = "gnu"))]
-extern crate link_cplusplus;
-extern crate modular_bitfield;
-extern crate parse_size;
-extern crate proc_macros;
-extern crate regex;
-extern crate reqwest;
-extern crate tokio;
-extern crate url;
-extern crate urlparse;
-#[cfg(feature = "utf16string")]
-extern crate utf16string;
-extern crate xml;
 
 #[cfg(feature = "avdict")]
 mod _avdict;