diff --git a/alerting/build.gradle b/alerting/build.gradle
index ca71d2761..b57835a90 100644
--- a/alerting/build.gradle
+++ b/alerting/build.gradle
@@ -198,7 +198,7 @@ String bwcFilePath = "src/test/resources/bwc"
     testClusters {
         "${baseName}$i" {
             testDistribution = "ARCHIVE"
-            versions = ["7.10.2","1.3.19-SNAPSHOT"]
+            versions = ["7.10.2","1.3.20-SNAPSHOT"]
             numberOfNodes = 3
             plugin(provider(new Callable<RegularFile>(){
                 @Override
diff --git a/build.gradle b/build.gradle
index 209d9693e..2304e123f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@ buildscript {
     apply from: 'build-tools/repositories.gradle'
 
     ext {
-        opensearch_version = System.getProperty("opensearch.version", "1.3.19-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "1.3.20-SNAPSHOT")
         // 1.0.0 -> 1.0.0.0, and 1.0.0-SNAPSHOT -> 1.0.0.0-SNAPSHOT
         opensearch_build = opensearch_version.replaceAll(/(\.\d+)([^\d]*)$/, '$1.0$2')
         common_utils_version = System.getProperty("common_utils.version", opensearch_build)