diff --git a/CHANGES.md b/CHANGES.md
index cee073245a4699c719d73003e92864b9fb5247d3..d4d12cdc71817f4166b4e6bf2cfea1a9bf1c5c09 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -38,6 +38,7 @@ Release Notes.
 * perf: use iterator.remove() to remove modulesWithoutProvider
 * Support analyzing Envoy TCP access logs and persist error TCP logs.
 * Fix: Envoy error logs are not persisted when no metrics are generated
+* Fix: Memory leakage of low version etcd client. [fix-issue](https://github.com/jurmous/etcd4j/pull/185)
 
 #### UI
 * Add logo for kong plugin.
diff --git a/dist-material/release-docs/LICENSE b/dist-material/release-docs/LICENSE
index 81f257d8d4659666e16a29b518e868f1987c85de..b2da952a392d9156cbdc4eb87b4eb41c236def0c 100755
--- a/dist-material/release-docs/LICENSE
+++ b/dist-material/release-docs/LICENSE
@@ -325,7 +325,7 @@ The text of each license is the standard Apache 2.0 license.
     Apache: commons-text 1.4: https://github.com/apache/commons-text Apache 2.0
     sundrio 0.9.2: https://github.com/sundrio/sundrio Apache 2.0
     Ctripcorp: apollo 1.4.0: https://github.com/ctripcorp/apollo Apache 2.0
-    etcd4j 2.17.0: https://github.com/jurmous/etcd4j Apache 2.0
+    etcd4j 2.18.0: https://github.com/jurmous/etcd4j Apache 2.0
     javaassist 3.25.0-GA: https://github.com/jboss-javassist/javassist Apache 2.0
     jackson-module-afterburner 2.9.5: https://github.com/FasterXML/jackson-modules-base, Apache 2.0
     perfmark-api 0.19.0: https://github.com/perfmark/perfmark, Apache 2.0
diff --git a/oap-server/pom.xml b/oap-server/pom.xml
index df7ee01abfda22a083b4af26662bbdc12e83ded2..beac50f7d955e056a07241759d282cea0586f4bb 100755
--- a/oap-server/pom.xml
+++ b/oap-server/pom.xml
@@ -84,7 +84,7 @@
         <maven-docker-plugin.version>0.30.0</maven-docker-plugin.version>
         <curator.version>4.0.1</curator.version>
         <curator-test.version>2.12.0</curator-test.version>
-        <etcd4j.version>2.17.0</etcd4j.version>
+        <etcd4j.version>2.18.0</etcd4j.version>
         <etcd.version>v3.2.3</etcd.version>
         <netty.version>4.1.42.Final</netty.version>
         <jackson-module-afterburner.version>2.9.5</jackson-module-afterburner.version>
diff --git a/tools/dependencies/known-oap-backend-dependencies-es7.txt b/tools/dependencies/known-oap-backend-dependencies-es7.txt
index 06df41b59b9b220761f4440b27553c310ac17d59..5d699fca9c3289b4d1209ea3784f1d9c5a0e7fe3 100755
--- a/tools/dependencies/known-oap-backend-dependencies-es7.txt
+++ b/tools/dependencies/known-oap-backend-dependencies-es7.txt
@@ -42,7 +42,7 @@ mapper-extras-client-7.5.0.jar
 parent-join-client-7.5.0.jar
 rank-eval-client-7.5.0.jar
 error_prone_annotations-2.3.2.jar
-etcd4j-2.17.0.jar
+etcd4j-2.18.0.jar
 failureaccess-1.0.1.jar
 flatbuffers-java-1.12.0.jar
 freemarker-2.3.28.jar
diff --git a/tools/dependencies/known-oap-backend-dependencies.txt b/tools/dependencies/known-oap-backend-dependencies.txt
index 9469791ad89594a363b3fae56021fb5137af216b..d36755244e8106582f1e563d6f631f5030894166 100755
--- a/tools/dependencies/known-oap-backend-dependencies.txt
+++ b/tools/dependencies/known-oap-backend-dependencies.txt
@@ -38,7 +38,7 @@ elasticsearch-rest-high-level-client-6.3.2.jar
 elasticsearch-secure-sm-6.3.2.jar
 elasticsearch-x-content-6.3.2.jar
 error_prone_annotations-2.3.2.jar
-etcd4j-2.17.0.jar
+etcd4j-2.18.0.jar
 failureaccess-1.0.1.jar
 flatbuffers-java-1.12.0.jar
 freemarker-2.3.28.jar