diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb28b17e9..78fc13f48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,16 @@ and Yorkie adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 
 ## [Unreleased]
 
+## [0.3.0] - 2023-01-31
+
+### Changed
+* Merge Text and RichText by @hackerwins in https://github.com/yorkie-team/yorkie/pull/438
+* Fix the value type of Counter and remove double type from Counter by @cozitive in https://github.com/yorkie-team/yorkie/pull/441
+
+### Fixed
+* Fix wrong string escape in Text's attrs by @cozitive in https://github.com/yorkie-team/yorkie/pull/443
+* Increase CRDT Counter in local change by @cozitive in https://github.com/yorkie-team/yorkie/pull/449
+
 ## [0.2.20] - 2022-12-30
 
 ### Changed
diff --git a/Makefile b/Makefile
index b83b97f13..71ab3dd82 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-YORKIE_VERSION := 0.2.20
+YORKIE_VERSION := 0.3.0
 
 GO_PROJECT = github.com/yorkie-team/yorkie
 
diff --git a/test/bench/document_bench_test.go b/test/bench/document_bench_test.go
index 20dae0af1..c84be5f2c 100644
--- a/test/bench/document_bench_test.go
+++ b/test/bench/document_bench_test.go
@@ -317,7 +317,7 @@ func BenchmarkDocument(b *testing.B) {
 				text.Edit(5, 5, "\n", map[string]string{"list": "true"})
 				assert.Equal(
 					b,
-					`[0:0:00:0 {} ""][1:2:00:0 {"b":"1"} "Hel"][1:2:00:3 {"b":"1","i":"1"} "lo"][5:1:00:0 {"list":"true"} "\n"][4:1:00:0 {} " Yorkie"]{1:2:00:5 {} " world"}`,
+					`[0:0:00:0 {} ""][1:2:00:0 {"b":"1"} "Hel"][1:2:00:3 {"b":"1","i":"1"} "lo"][5:1:00:0 {"list":"true"} "\\n"][4:1:00:0 {} " Yorkie"]{1:2:00:5 {} " world"}`,
 					text.StructureAsString(),
 				)
 				return nil
@@ -325,7 +325,7 @@ func BenchmarkDocument(b *testing.B) {
 			assert.NoError(b, err)
 			assert.Equal(
 				b,
-				`{"k1":[{"attrs":{"b":"1"},"val":"Hel"},{"attrs":{"b":"1","i":"1"},"val":"lo"},{"attrs":{"list":"true"},"val":"\n"},{"val":" Yorkie"}]}`,
+				`{"k1":[{"attrs":{"b":"1"},"val":"Hel"},{"attrs":{"b":"1","i":"1"},"val":"lo"},{"attrs":{"list":"true"},"val":"\\n"},{"val":" Yorkie"}]}`,
 				doc.Marshal(),
 			)
 		}