diff --git a/datasources/build.gradle b/datasources/build.gradle
index 9bd233e1f9..9456141e80 100644
--- a/datasources/build.gradle
+++ b/datasources/build.gradle
@@ -22,7 +22,12 @@ dependencies {
     implementation group: 'org.opensearch', name: 'opensearch-x-content', version: "${opensearch_version}"
     implementation group: 'org.opensearch', name: 'common-utils', version: "${opensearch_build}"
     implementation group: 'commons-io', name: 'commons-io', version: '2.8.0'
-    implementation 'com.amazonaws:aws-encryption-sdk-java:2.4.1'
+    // FIXME. upgrade aws-encryption-sdk-java once the bouncycastle dependency update to 1.78.
+    implementation ('com.amazonaws:aws-encryption-sdk-java:2.4.1') {
+        exclude group: 'org.bouncycastle', module: 'bcprov-ext-jdk18on'
+    }
+    // Use OpenSearch bouncycastle version. https://github.com/opensearch-project/OpenSearch/blob/main/buildSrc/version.properties
+    implementation "org.bouncycastle:bcprov-jdk18on:${versions.bouncycastle}"
     implementation group: 'commons-validator', name: 'commons-validator', version: '1.7'
 
     testImplementation group: 'junit', name: 'junit', version: '4.13.2'