diff --git a/CHANGELOG.md b/CHANGELOG.md
index edeb6de..6968d3e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,18 @@
+## [v0.3.0] - 2023-10-13
+
+### Added
+
+Docs: Add more jsonb encoding format descriptions. (#34)
+Feat: Support `object_each` api. (#33)
+Feat: Support `path_exists` api. (#32)
+Feat: Support `type_of` api. (#31)
+Feat: Support `strip_nulls` api. (#30)
+Perf: Add benches for parser and `get_path`. (#29)
+Chore: Add check fmt and clippy. (#27)
+Feat: Support `to_pretty_string` api. (#26)
+Feat: Support `traverse_check_string` function. (#25)
+Feat: Improve json path selector using less memory. (#24)
+
 ## [v0.2.3] - 2023-07-10
 
 ### Fixed
diff --git a/Cargo.toml b/Cargo.toml
index a69debc..c51371a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,24 +22,24 @@ keywords = ["json", "jsonb", "jsonpath"]
 license = "Apache-2.0"
 name = "jsonb"
 repository = "https://github.com/datafuselabs/jsonb"
-version = "0.2.3"
+version = "0.3.0"
 rust-version = "1.68"
 
 [dependencies]
-byteorder = "1.4.3"
+byteorder = "1.5.0"
 fast-float = "0.2.0"
 nom = "7.1.3"
-ordered-float = { version = "3.6.0", default-features = false }
+ordered-float = { version = "4.1.1", default-features = false }
 rand = { version = "0.8.5", features = ["small_rng"] }
-serde_json = { version = "1.0.95", default-features = false, features = [
+serde_json = { version = "1.0.107", default-features = false, features = [
   "preserve_order",
 ] }
 
 [dev-dependencies]
 goldenfile = "1.5.2"
-serde_json = "1.0.105"
+serde_json = "1.0.107"
 json-deserializer = "0.4.4"
-simd-json = {version = "0.10.6", features = ["allow-non-simd"]}
+simd-json = {version = "0.11.1", features = ["allow-non-simd"]}
 mockalloc = "0.1.2"
 criterion = "0.5.1"
 
diff --git a/src/functions.rs b/src/functions.rs
index 254f0e1..12e19a5 100644
--- a/src/functions.rs
+++ b/src/functions.rs
@@ -1054,7 +1054,12 @@ pub fn is_object(value: &[u8]) -> bool {
 /// Convert `JSONB` value to String
 pub fn to_string(value: &[u8]) -> String {
     if !is_jsonb(value) {
-        return String::from_utf8_lossy(value).to_string();
+        // empty value as default null
+        if value.is_empty() {
+            return "null".to_string();
+        } else {
+            return String::from_utf8_lossy(value).to_string();
+        }
     }
 
     let mut json = String::new();
@@ -1065,7 +1070,12 @@ pub fn to_string(value: &[u8]) -> String {
 /// Convert `JSONB` value to pretty String
 pub fn to_pretty_string(value: &[u8]) -> String {
     if !is_jsonb(value) {
-        return String::from_utf8_lossy(value).to_string();
+        // empty value as default null
+        if value.is_empty() {
+            return "null".to_string();
+        } else {
+            return String::from_utf8_lossy(value).to_string();
+        }
     }
 
     let mut json = String::new();