diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32e617a7b..9f7f835a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,9 @@
 ### Features Added
 - Add `--azure-response-timeout` to allow request response timeout to be configurable, the field `timeout` is also accepted in the Azure metadata file. [#888](https://github.com/Consensys/web3signer/pull/888)
 
+### Bugs fixed
+- Upcheck was using application/json accept headers instead text/plain accept headers
+
 ## 23.8.1
 
 ### Bugs fixed
diff --git a/acceptance-tests/src/test/java/tech/pegasys/web3signer/tests/UpcheckAcceptanceTest.java b/acceptance-tests/src/test/java/tech/pegasys/web3signer/tests/UpcheckAcceptanceTest.java
index 6f2f090d7..e21ecc9b2 100644
--- a/acceptance-tests/src/test/java/tech/pegasys/web3signer/tests/UpcheckAcceptanceTest.java
+++ b/acceptance-tests/src/test/java/tech/pegasys/web3signer/tests/UpcheckAcceptanceTest.java
@@ -28,6 +28,7 @@ void upcheckOnCorrectPortRespondsWithOK() {
 
     given()
         .baseUri(signer.getUrl())
+        .accept(ContentType.TEXT)
         .get("/upcheck")
         .then()
         .statusCode(200)
diff --git a/core/src/main/java/tech/pegasys/web3signer/core/Runner.java b/core/src/main/java/tech/pegasys/web3signer/core/Runner.java
index 56cb4fc86..e4e0716b2 100644
--- a/core/src/main/java/tech/pegasys/web3signer/core/Runner.java
+++ b/core/src/main/java/tech/pegasys/web3signer/core/Runner.java
@@ -77,6 +77,7 @@
 
 public abstract class Runner implements Runnable, AutoCloseable {
   public static final String JSON = HttpHeaderValues.APPLICATION_JSON.toString();
+  public static final String TEXT_PLAIN = HttpHeaderValues.TEXT_PLAIN.toString();
   public static final String HEALTHCHECK_PATH = "/healthcheck";
   public static final String UPCHECK_PATH = "/upcheck";
   public static final String RELOAD_PATH = "/reload";
@@ -253,7 +254,7 @@ protected void addReloadHandler(
   private void registerUpcheckRoute(final Router router, final LogErrorHandler errorHandler) {
     router
         .route(HttpMethod.GET, UPCHECK_PATH)
-        .produces(JSON)
+        .produces(TEXT_PLAIN)
         .handler(new BlockingHandlerDecorator(new UpcheckHandler(), false))
         .failureHandler(errorHandler);
   }