diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index 45de6798..228ee690 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -11,7 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - drop Node.js 14 support from build and readme
 - bump `@emurgo/cardano-serialization-lib-nodejs` and dev deps
-- enabled retry logic for requests failing on `EPROTO` error
+- enabled retry logic for requests failing on `EPROTO` error and `520` status code
 
 ### Fixed
 
diff --git a/src/utils/index.ts b/src/utils/index.ts
index d6d6a070..426c4527 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -65,7 +65,7 @@ export const validateOptions = (options?: Options): ValidatedOptions => {
     retrySettings: options.retrySettings ?? {
       limit: 3, // retry count
       methods: ['GET', 'PUT', 'HEAD', 'DELETE', 'OPTIONS', 'TRACE'], // no retry on POST
-      statusCodes: [408, 413, 429, 500, 502, 503, 504, 521, 522, 524],
+      statusCodes: [408, 413, 429, 500, 502, 503, 504, 520, 521, 522, 524],
       errorCodes: [
         'ETIMEDOUT',
         'ECONNRESET',
diff --git a/test/tests/utils/utils.ts b/test/tests/utils/utils.ts
index 7918f019..57b8f612 100644
--- a/test/tests/utils/utils.ts
+++ b/test/tests/utils/utils.ts
@@ -150,7 +150,7 @@ describe('utils', () => {
       retrySettings: {
         limit: 3,
         methods: ['GET', 'PUT', 'HEAD', 'DELETE', 'OPTIONS', 'TRACE'],
-        statusCodes: [408, 413, 429, 500, 502, 503, 504, 521, 522, 524],
+        statusCodes: [408, 413, 429, 500, 502, 503, 504, 520, 521, 522, 524],
         errorCodes: [
           'ETIMEDOUT',
           'ECONNRESET',