diff --git a/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/OkHttpRestClient.java b/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/OkHttpRestClient.java
index dbaf436d413..9360f185ba7 100644
--- a/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/OkHttpRestClient.java
+++ b/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/OkHttpRestClient.java
@@ -39,7 +39,7 @@
 
 public class OkHttpRestClient implements RestClient {
 
-  static final MediaType JSON_MEDIA_TYPE = MediaType.parse("application/json; charset=utf-8");
+  static final MediaType JSON_MEDIA_TYPE = MediaType.parse("application/json");
   static final MediaType OCTET_STREAM_MEDIA_TYPE = MediaType.parse("application/octet-stream");
 
   private final OkHttpClient httpClient;