diff --git a/build.gradle b/build.gradle
index cf8d8fb..e52ef51 100644
--- a/build.gradle
+++ b/build.gradle
@@ -31,6 +31,7 @@
     compile("com.fasterxml.jackson.core:jackson-databind")
     compile("org.hibernate:hibernate-core:5.4.2.Final")
     compileOnly('org.projectlombok:lombok:1.16.10')
+    implementation 'org.glassfish.tyrus:tyrus-container-grizzly-server:1.13.1'
     implementation 'com.squareup.okhttp3:okhttp:3.12.0'
     implementation 'org.springframework.boot:spring-boot-starter-websocket'