diff --git a/compress/src/compress/const.rs b/compress/src/compress/const.rs
index 7a99b82..102a419 100644
--- a/compress/src/compress/const.rs
+++ b/compress/src/compress/const.rs
@@ -1,8 +1,8 @@
 /// The header name for content encoding.
-pub const CONTENT_ENCODING: &str = "content-encoding";
+pub(crate) const CONTENT_ENCODING: &str = "content-encoding";
 
 /// An empty string.
-pub const EMPTY_STR: &str = "";
+pub(crate) const EMPTY_STR: &str = "";
 
 /// The content encoding type for gzip.
 pub(crate) const CONTENT_ENCODING_GZIP: &str = "gzip";
diff --git a/request/src/common/const.rs b/request/src/common/const.rs
index e6d8492..a8f9f21 100644
--- a/request/src/common/const.rs
+++ b/request/src/common/const.rs
@@ -1,2 +1,2 @@
 /// The application name used for user agent and logging.
-pub const APP_NAME: &str = "http-request";
+pub(crate) const APP_NAME: &str = "http-request";
diff --git a/request/src/common/mod.rs b/request/src/common/mod.rs
index 71f07d7..f17857f 100644
--- a/request/src/common/mod.rs
+++ b/request/src/common/mod.rs
@@ -2,6 +2,8 @@ mod r#const;
 mod r#impl;
 mod r#struct;
 
-pub use {r#const::*, r#struct::*};
+pub use r#struct::*;
+
+pub(crate) use r#const::*;
 
 use super::*;
diff --git a/request/tests/url/fn.rs b/request/tests/url/fn.rs
index 0e9285f..a2783b8 100644
--- a/request/tests/url/fn.rs
+++ b/request/tests/url/fn.rs
@@ -101,11 +101,6 @@ fn test_request_error_clone_and_equality() {
     assert_ne!(cloned, RequestError::Request("other".to_string()));
 }
 
-#[test]
-fn test_app_name_constant() {
-    assert_eq!(APP_NAME, "http-request");
-}
-
 #[test]
 fn test_header_name_constants() {
     assert_eq!(ACCEPT, "accept");
diff --git a/rust-standards.toml b/rust-standards.toml
new file mode 100644
index 0000000..062826c
--- /dev/null
+++ b/rust-standards.toml
@@ -0,0 +1 @@
+pub_const_exempt = ["http-constant"]