fix GEARPUMP-181 Create 0.8.1-RC4 release

Author: Kam Kasravi <kamkasravi@yahoo.com>

Closes #65 from kkasravi/GEARPUMP-181.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 143222d..8a24bf4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 ==================
 Change log:
 ------------------
+- GEARPUMP-182 Correct references required for source release in LICENSE file
+- GEARPUMP-181 Create 0.8.1-RC4 release
+- GEARPUMP-180 Add DISCLAIMER to release artifacts
 - GEARPUMP-178 Create 0.8.1-RC3 release
 - GEARPUMP-177 Documentation build errors when trying to generate documentation
 - GEARPUMP-176 Create 0.8.1-RC2 release
diff --git a/docs/_config.yml b/docs/_config.yml
index 57b5759..ff727d7 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -16,6 +16,6 @@
   - build_doc.sh
 
 # These allow the documentation to be updated with newer releases of Gearpump
-GEARPUMP_VERSION: 0.8.1-RC3
+GEARPUMP_VERSION: 0.8.1-RC4
 SCALA_BINARY_VERSION: "2.11"
 SCALA_VERSION: "2.11.8"
diff --git a/version.sbt b/version.sbt
index 84ab93f..b8ea568 100644
--- a/version.sbt
+++ b/version.sbt
@@ -16,4 +16,4 @@
  * limitations under the License.
  */
 
-version in ThisBuild := "0.8.1-RC3"
+version in ThisBuild := "0.8.1-RC4"