diff --git a/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java b/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java
index 72b67441a18..c922cfcc4be 100644
--- a/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java
+++ b/src/main/java/org/opentripplanner/framework/io/OtpHttpClient.java
@@ -138,6 +138,7 @@ private OtpHttpClient(Duration timeout, Duration connectionTtl, int maxConnectio
 
     HttpClientBuilder httpClientBuilder = HttpClients
       .custom()
+      .setUserAgent("OpenTripPlanner")
       .setConnectionManager(connectionManager)
       .setDefaultRequestConfig(requestConfig(timeout));