diff --git a/core/Cargo.toml b/core/Cargo.toml
index e007e225b..3ae100bf2 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -17,7 +17,7 @@ chrono = { version = "0", optional = true }
 heck = { version = "0.3", optional = true }
 lazy_static = "1.3"
 log = { version = "0.4", optional = true }
-mime = { git = "https://github.com/hyperium/mime", rev = "938484de95445a2af931515d2b7252612c575da7", features = ["serde1"] }
+mime = "0.3"
 paperclip-macros = { path = "../macros", version = "0.3.0" }
 parking_lot = { version = "0.10", features = ["serde"] }
 rust_decimal = { version = "1", optional = true }
diff --git a/core/src/v2/extensions.rs b/core/src/v2/extensions.rs
index d87468c56..988fc7d9e 100644
--- a/core/src/v2/extensions.rs
+++ b/core/src/v2/extensions.rs
@@ -3,13 +3,14 @@ use serde::{Deserialize, Deserializer, Serialize, Serializer};
 
 use std::cmp::Ordering;
 use std::collections::BTreeMap;
+use std::fmt;
 use std::ops::{Deref, DerefMut};
 use std::sync::Arc;
 
 lazy_static! {
     /// Media range for JSON.
     pub static ref JSON_MIME: MediaRange =
-        MediaRange(mime::MediaRange::parse("application/json").expect("parsing mime"));
+        MediaRange("application/json".parse().expect("parsing mime"));
     /// Default coder for JSON.
     pub static ref JSON_CODER: Arc<Coder> = Arc::new(Coder {
         encoder_path: "serde_json::to_writer".into(),
@@ -21,7 +22,7 @@ lazy_static! {
     });
     /// Media range for YAML.
     pub static ref YAML_MIME: MediaRange =
-        MediaRange(mime::MediaRange::parse("application/yaml").expect("parsing mime"));
+        MediaRange("application/yaml".parse().expect("parsing mime"));
     /// Default coder for YAML.
     pub static ref YAML_CODER: Arc<Coder> = Arc::new(Coder {
         encoder_path: "serde_yaml::to_writer".into(),
@@ -35,14 +36,14 @@ lazy_static! {
 
 /// Wrapper for `mime::MediaRange` to support `BTree{Set, Map}`.
 #[derive(Debug, Clone)]
-pub struct MediaRange(pub mime::MediaRange);
+pub struct MediaRange(pub mime::Mime);
 
 #[cfg(feature = "codegen")]
 impl MediaRange {
     /// Implementation from https://github.com/hyperium/mime/blob/65ea9c3d0cad4cb548b41124050c545120134035/src/range.rs#L155
     fn matches_params(&self, r: &Self) -> bool {
         for (name, value) in self.0.params() {
-            if name != "q" && r.0.param(name) != Some(value) {
+            if name != "q" && r.0.get_param(name) != Some(value) {
                 return false;
             }
         }
@@ -51,7 +52,7 @@ impl MediaRange {
     }
 }
 
-/// `x-coder` global extension for custom encoders and decoders.
+/// `x-rust-coders` global extension for custom encoders and decoders.
 #[derive(Debug, Default, Clone)]
 pub struct Coders(BTreeMap<MediaRange, Arc<Coder>>);
 
@@ -140,7 +141,7 @@ impl Serialize for MediaRange {
     where
         S: Serializer,
     {
-        self.0.serialize(serializer)
+        serializer.serialize_str(self.0.as_ref())
     }
 }
 
@@ -149,7 +150,24 @@ impl<'de> Deserialize<'de> for MediaRange {
     where
         D: Deserializer<'de>,
     {
-        Ok(MediaRange(mime::MediaRange::deserialize(deserializer)?))
+        struct Visitor;
+
+        impl<'de> serde::de::Visitor<'de> for Visitor {
+            type Value = MediaRange;
+
+            fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                f.write_str("a valid media range")
+            }
+
+            fn visit_str<E>(self, value: &str) -> Result<MediaRange, E>
+            where
+                E: serde::de::Error,
+            {
+                value.parse().map_err(E::custom).map(MediaRange)
+            }
+        }
+
+        deserializer.deserialize_str(Visitor)
     }
 }
 
diff --git a/core/src/v2/models.rs b/core/src/v2/models.rs
index 34aa06c38..3ce84775b 100644
--- a/core/src/v2/models.rs
+++ b/core/src/v2/models.rs
@@ -119,6 +119,18 @@ pub struct Api<P, R, S> {
     pub tags: Vec<Tag>,
     #[serde(rename = "externalDocs", skip_serializing_if = "Option::is_none")]
     pub external_docs: Option<ExternalDocs>,
+    /// Extension for custom coders to be used for decoding API objects.
+    ///
+    /// An example for JSON would be:
+    /// ```yaml
+    /// x-rust-coders:
+    ///   application/json:
+    ///     encoder_path: serde_json::to_writer
+    ///     decoder_path: serde_json::from_reader
+    ///     any_value: serde_json::Value
+    ///     error_path: serde_json::Error
+    /// ```
+    /// **NOTE:** JSON and YAML encodings are already supported.
     #[serde(
         default,
         rename = "x-rust-coders",
@@ -129,13 +141,13 @@ pub struct Api<P, R, S> {
     ///
     /// The key is the LHS of a dependency, which is the crate name.
     /// The value is the RHS of a crate's requirements as it would appear
-    /// in the manifest. Note that the caller must add proper quoting
-    /// whenever required.
+    /// in the manifest. Note that the caller must add proper escaping
+    /// wherever required.
     ///
-    /// For example, in a JSON spec, the following are all valid:
-    /// - `{"my_crate": "0.7"}`
-    /// - `{"my_crate": "{ git = \"git://foo.bar/repo\" }"}`
-    /// - `{"my_crate": "{ version = \"0.9\", features = [\"booya\"] }"}`
+    /// For example, the following are all valid:
+    /// - `my_crate: "0.7"`
+    /// - `my_crate: "{ git = \"git://foo.bar/repo\" }"`
+    /// - `my_crate: "{ version = \"0.9\", features = [\"booya\"] }"`
     #[serde(
         default,
         rename = "x-rust-dependencies",