diff --git a/java_tools/proxy_server/build.gradle b/java_tools/proxy_server/build.gradle
index 01a55d6948..df3d027e4e 100644
--- a/java_tools/proxy_server/build.gradle
+++ b/java_tools/proxy_server/build.gradle
@@ -11,6 +11,7 @@ dependencies {
     implementation 'org.glassfish:javax.json:1.1.4'
 
     testImplementation testFixtures(project(':ecu_io'))
+    testImplementation ts_plugin_libs.httpcore
 
     implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.13.3'
     implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.3'