diff --git a/README.md b/README.md
index 4a2ee26..a3ef219 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,6 @@ cargo test --all-features
 
 * **default** - ["primitives"]
 * **macro** - Activates `config!` macros for easy configure web application.
-* **array** - Add EnvString impl for vector type (uses optional `serde_json` package).
 * **primitives** - Group for features: `numbers` and `bool`.
 * **numbers** - Group for features: `int`, `uint` and `float`.
 * **int** - Group for features: `i8`, `i16`, `i32`, `i64`, `i128` and `isize`.
@@ -149,6 +148,7 @@ cargo test --all-features
 * **f32** - impl EnvString for `f32` type
 * **f64** - impl EnvString for `f64` type
 * **bool** - impl EnvString for `bool` type
+* **json_array** - Add EnvString impl for vector type (uses optional `serde_json` package). ⚠ **_DEPRECATED_**
 
 
 ## License
diff --git a/itconfig/Cargo.toml b/itconfig/Cargo.toml
index c327ec2..15d80d3 100644
--- a/itconfig/Cargo.toml
+++ b/itconfig/Cargo.toml
@@ -26,8 +26,6 @@ default = ["primitives"]
 
 macro = ["itconfig-macro"]
 
-array = ["serde_json"]
-
 primitives = ["numbers", "bool"]
 numbers = ["int", "uint", "float"]
 int = ["i8", "i16", "i32", "i64", "i128", "isize"]
@@ -53,6 +51,9 @@ f64   = []
 
 bool  = []
 
+# deprecated since 1.1
+json_array = ["serde_json"]
+
 
 [badges]
 travis-ci = { repository = "icetemple/itconfig-rs" }
diff --git a/itconfig/src/envstr.rs b/itconfig/src/envstr.rs
index 8da5307..efc7838 100644
--- a/itconfig/src/envstr.rs
+++ b/itconfig/src/envstr.rs
@@ -1,5 +1,30 @@
 use std::ops::Deref;
 
+/// Wrapper under String type.
+///
+/// When we read the environment variable, we automatically convert the value
+/// to EnvString and then convert it to your expected type.
+///
+#[derive(Debug, PartialEq, Clone)]
+pub struct EnvString(String);
+
+impl<T> From<T> for EnvString
+where
+    T: ToEnvString,
+{
+    fn from(val: T) -> Self {
+        val.to_env_string()
+    }
+}
+
+impl Deref for EnvString {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
 /// A trait for converting value to EnvString.
 ///
 /// This trait automatically implemented for any type which implements the
@@ -94,15 +119,40 @@ impl FromEnvString for bool {
     }
 }
 
-#[doc(hidden)]
-#[cfg(feature = "array")]
+impl FromEnvString for String {
+    type Err = ();
+
+    fn from_env_string(s: &EnvString) -> Result<Self, Self::Err> {
+        Ok(s.0.clone())
+    }
+}
+
+impl FromEnvString for &'static str {
+    type Err = ();
+
+    fn from_env_string(s: &EnvString) -> Result<Self, Self::Err> {
+        Ok(Box::leak(s.0.clone().into_boxed_str()))
+    }
+}
+
+//===========================================================================//
+// DEPRECATED                                                                //
+//===========================================================================//
+
+/// Error type for json array implementation
+#[cfg(feature = "json_array")]
 #[derive(Debug)]
+#[deprecated(since = "1.1.0")]
 pub enum ArrayEnvError {
+    /// Invalid type.
     InvalidType,
+
+    /// Failed to parse environment variable
     FailedToParse,
 }
 
-#[cfg(feature = "array")]
+#[cfg(feature = "json_array")]
+#[allow(deprecated)]
 impl<T> FromEnvString for Vec<T>
 where
     T: FromEnvString,
@@ -124,44 +174,3 @@ where
             })
     }
 }
-
-impl FromEnvString for String {
-    type Err = ();
-
-    fn from_env_string(s: &EnvString) -> Result<Self, Self::Err> {
-        Ok(s.0.clone())
-    }
-}
-
-impl FromEnvString for &'static str {
-    type Err = ();
-
-    fn from_env_string(s: &EnvString) -> Result<Self, Self::Err> {
-        Ok(Box::leak(s.0.clone().into_boxed_str()))
-    }
-}
-
-/// Wrapper under String type.
-///
-/// When we read the environment variable, we automatically convert the value
-/// to EnvString and then convert it to your expected type.
-///
-#[derive(Debug, PartialEq, Clone)]
-pub struct EnvString(String);
-
-impl<T> From<T> for EnvString
-where
-    T: ToEnvString,
-{
-    fn from(val: T) -> Self {
-        val.to_env_string()
-    }
-}
-
-impl Deref for EnvString {
-    type Target = String;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
diff --git a/itconfig/src/lib.rs b/itconfig/src/lib.rs
index 32a2bb8..2ca2655 100644
--- a/itconfig/src/lib.rs
+++ b/itconfig/src/lib.rs
@@ -113,7 +113,6 @@
 //!
 //! * **default** - ["primitives"]
 //! * **macro** - Activates `config!` macros for easy configure web application.
-//! * **array** - Add EnvString impl for vector type (uses optional `serde_json` package).
 //! * **primitives** - Group for features: `numbers` and `bool`.
 //! * **numbers** - Group for features: `int`, `uint` and `float`.
 //! * **int** - Group for features: `i8`, `i16`, `i32`, `i64`, `i128` and `isize`.
@@ -134,6 +133,7 @@
 //! * **f32** - impl EnvString for `f32` type
 //! * **f64** - impl EnvString for `f64` type
 //! * **bool** - impl EnvString for `bool` type
+//! * **json_array** - Add EnvString impl for vector type (uses optional `serde_json` package). ⚠ **_DEPRECATED_**
 //!
 
 // Rustc lints.