diff --git a/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java b/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java
index ebfeb3ff496..ccb88c3c74b 100644
--- a/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java
+++ b/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java
@@ -378,6 +378,7 @@ private static RequestConfig requestConfig(Duration timeout) {
       .custom()
       .setResponseTimeout(Timeout.of(timeout))
       .setConnectionRequestTimeout(Timeout.of(timeout))
+      .setProtocolUpgradeEnabled(false)
       .build();
   }
 
diff --git a/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClientFactory.java b/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClientFactory.java
index a6436168541..8f7256f642f 100644
--- a/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClientFactory.java
+++ b/application/src/main/java/org/opentripplanner/framework/io/OtpHttpClientFactory.java
@@ -132,6 +132,7 @@ private static RequestConfig requestConfig(Duration timeout) {
       .custom()
       .setResponseTimeout(Timeout.of(timeout))
       .setConnectionRequestTimeout(Timeout.of(timeout))
+      .setProtocolUpgradeEnabled(false)
       .build();
   }
 }