diff --git a/.codegen.json b/.codegen.json
index c7fca8329..3565961ef 100644
--- a/.codegen.json
+++ b/.codegen.json
@@ -1 +1 @@
-{ "engineHash": "b98d1dc", "specHash": "cf21406", "version": "5.0.0" }
+{ "engineHash": "4421f42", "specHash": "cf21406", "version": "5.0.0" }
diff --git a/src/main/java/com/box/sdkgen/networking/retries/BoxRetryStrategy.java b/src/main/java/com/box/sdkgen/networking/retries/BoxRetryStrategy.java
index 6c2891681..dcba2d307 100644
--- a/src/main/java/com/box/sdkgen/networking/retries/BoxRetryStrategy.java
+++ b/src/main/java/com/box/sdkgen/networking/retries/BoxRetryStrategy.java
@@ -36,7 +36,10 @@ public boolean shouldRetry(
       return attemptNumber <= this.maxRetriesOnException;
     }
     boolean isSuccessful = fetchResponse.getStatus() >= 200 && fetchResponse.getStatus() < 400;
-    String retryAfterHeader = fetchResponse.getHeaders().get("Retry-After");
+    String retryAfterHeader =
+        (fetchResponse.getHeaders().containsKey("Retry-After")
+            ? fetchResponse.getHeaders().get("Retry-After")
+            : null);
     boolean isAcceptedWithRetryAfter =
         fetchResponse.getStatus() == 202 && !(retryAfterHeader == null);
     if (attemptNumber >= this.maxAttempts) {