diff --git a/protocol/src/main/java/org/opensearch/sql/protocol/response/format/ErrorFormatter.java b/protocol/src/main/java/org/opensearch/sql/protocol/response/format/ErrorFormatter.java
index c7d462dab86..40848e959b2 100644
--- a/protocol/src/main/java/org/opensearch/sql/protocol/response/format/ErrorFormatter.java
+++ b/protocol/src/main/java/org/opensearch/sql/protocol/response/format/ErrorFormatter.java
@@ -17,11 +17,13 @@
 @UtilityClass
 public class ErrorFormatter {
 
-  private static final Gson PRETTY_PRINT_GSON =
-      AccessController.doPrivileged(
-          (PrivilegedAction<Gson>) () -> new GsonBuilder().setPrettyPrinting().create());
+  private static final Gson PRETTY_PRINT_GSON = AccessController.doPrivileged(
+          (PrivilegedAction<Gson>) () -> new GsonBuilder()
+              .setPrettyPrinting()
+              .disableHtmlEscaping()
+              .create());
   private static final Gson GSON = AccessController.doPrivileged(
-      (PrivilegedAction<Gson>) () -> new GsonBuilder().create());
+      (PrivilegedAction<Gson>) () -> new GsonBuilder().disableHtmlEscaping().create());
 
   /**
    * Util method to format {@link Throwable} response to JSON string in compact printing.
diff --git a/protocol/src/test/java/org/opensearch/sql/protocol/response/format/ErrorFormatterTest.java b/protocol/src/test/java/org/opensearch/sql/protocol/response/format/ErrorFormatterTest.java
new file mode 100644
index 00000000000..f19f6bb2aed
--- /dev/null
+++ b/protocol/src/test/java/org/opensearch/sql/protocol/response/format/ErrorFormatterTest.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.protocol.response.format;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.google.common.collect.ImmutableMap;
+import org.junit.jupiter.api.Test;
+
+class ErrorFormatterTest {
+
+  // https://www.javadoc.io/doc/com.google.code.gson/gson/2.7/com/google/gson/GsonBuilder.html#disableHtmlEscaping--
+  @Test
+  void htmlEscaping_should_disabled() {
+    assertEquals(
+        "{\n" + "  \"request\": \"index=test\"\n" + "}",
+        ErrorFormatter.prettyJsonify(ImmutableMap.of("request", "index=test")));
+    assertEquals(
+        "{\"request\":\"index=test\"}",
+        ErrorFormatter.compactJsonify(ImmutableMap.of("request", "index=test")));
+  }
+}