diff --git a/src/main/java/DiffLens/back_end/global/web/WebClientConfig.java b/src/main/java/DiffLens/back_end/global/web/WebClientConfig.java
index a4149ac..b79bd9f 100644
--- a/src/main/java/DiffLens/back_end/global/web/WebClientConfig.java
+++ b/src/main/java/DiffLens/back_end/global/web/WebClientConfig.java
@@ -18,6 +18,7 @@ public RestTemplate restTemplate() {
     public WebClient fastApiWebClient(@Value("${fast-api.url}") String baseUrl) {
         return WebClient.builder()
                 .baseUrl(baseUrl)
+                .codecs(configurer -> configurer.defaultCodecs().maxInMemorySize(10 * 1024 * 1024)) // 10MB
                 .build();
     }