diff --git a/zeppelin-server/src/main/java/org/apache/zeppelin/interpreter/InterpreterSettingManager.java b/zeppelin-server/src/main/java/org/apache/zeppelin/interpreter/InterpreterSettingManager.java
index e2959382206..14e392a8f93 100644
--- a/zeppelin-server/src/main/java/org/apache/zeppelin/interpreter/InterpreterSettingManager.java
+++ b/zeppelin-server/src/main/java/org/apache/zeppelin/interpreter/InterpreterSettingManager.java
@@ -359,7 +359,7 @@ private void removeInterpreterSetting(String id) {
     }
   }
 
-  public void saveToFile() throws IOException {
+  public synchronized void saveToFile() throws IOException {
     InterpreterInfoSaving info = new InterpreterInfoSaving();
     info.interpreterSettings = new HashMap<>(interpreterSettings);
     info.interpreterRepositories = interpreterRepositories;