diff --git a/instrumentation/jsonrpc4j-1.6/javaagent/build.gradle.kts b/instrumentation/jsonrpc4j-1.6/javaagent/build.gradle.kts
index db5746f18fa3..7f8ff07696a4 100644
--- a/instrumentation/jsonrpc4j-1.6/javaagent/build.gradle.kts
+++ b/instrumentation/jsonrpc4j-1.6/javaagent/build.gradle.kts
@@ -11,11 +11,11 @@ muzzle {
   }
 }
 
-val jsonrpcVersion = "1.6"
-
 dependencies {
   implementation(project(":instrumentation:jsonrpc4j-1.6:library"))
-  library("com.github.briandilley.jsonrpc4j:jsonrpc4j:$jsonrpcVersion")
+
+  library("com.github.briandilley.jsonrpc4j:jsonrpc4j:1.6")
+
   testImplementation(project(":instrumentation:jsonrpc4j-1.6:testing"))
 }
 
diff --git a/instrumentation/jsonrpc4j-1.6/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/JsonRpcServerInstrumentation.java b/instrumentation/jsonrpc4j-1.6/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/JsonRpcServerInstrumentation.java
index 74d18989e000..e1e48c9d9fde 100644
--- a/instrumentation/jsonrpc4j-1.6/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/JsonRpcServerInstrumentation.java
+++ b/instrumentation/jsonrpc4j-1.6/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/JsonRpcServerInstrumentation.java
@@ -6,6 +6,7 @@
 package io.opentelemetry.javaagent.instrumentation.jsonrpc4j.v1_6;
 
 import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
+import static io.opentelemetry.javaagent.instrumentation.jsonrpc4j.v1_6.JsonRpcSingletons.SERVER_INVOCATION_LISTENER;
 import static net.bytebuddy.matcher.ElementMatchers.isConstructor;
 import static net.bytebuddy.matcher.ElementMatchers.isMethod;
 import static net.bytebuddy.matcher.ElementMatchers.named;
@@ -51,7 +52,7 @@ public static void setInvocationListener(
         @Advice.This JsonRpcBasicServer jsonRpcServer,
         @Advice.FieldValue(value = "invocationListener", readOnly = false)
             InvocationListener invocationListener) {
-      invocationListener = JsonRpcSingletons.SERVER_INVOCATION_LISTENER;
+      invocationListener = SERVER_INVOCATION_LISTENER;
     }
   }
 
@@ -67,14 +68,13 @@ public static void setInvocationListener(
           VirtualField.find(JsonRpcBasicServer.class, Boolean.class);
       if (!Boolean.TRUE.equals(instrumented.get(jsonRpcServer))) {
         if (invocationListener == null) {
-          invocationListener = JsonRpcSingletons.SERVER_INVOCATION_LISTENER;
+          invocationListener = SERVER_INVOCATION_LISTENER;
         } else if (invocationListener instanceof MultipleInvocationListener) {
           ((MultipleInvocationListener) invocationListener)
-              .addInvocationListener(JsonRpcSingletons.SERVER_INVOCATION_LISTENER);
+              .addInvocationListener(SERVER_INVOCATION_LISTENER);
         } else {
           invocationListener =
-              new MultipleInvocationListener(
-                  invocationListener, JsonRpcSingletons.SERVER_INVOCATION_LISTENER);
+              new MultipleInvocationListener(invocationListener, SERVER_INVOCATION_LISTENER);
         }
 
         instrumented.set(jsonRpcServer, true);
diff --git a/instrumentation/jsonrpc4j-1.6/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/AgentJsonRpcTest.java b/instrumentation/jsonrpc4j-1.6/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/AgentJsonRpcTest.java
index 26e85daf86dc..de74aa73ad38 100644
--- a/instrumentation/jsonrpc4j-1.6/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/AgentJsonRpcTest.java
+++ b/instrumentation/jsonrpc4j-1.6/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/jsonrpc4j/v1_6/AgentJsonRpcTest.java
@@ -11,7 +11,7 @@
 import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
-public class AgentJsonRpcTest extends AbstractJsonRpcTest {
+class AgentJsonRpcTest extends AbstractJsonRpcTest {
 
   @RegisterExtension
   static final InstrumentationExtension testing = AgentInstrumentationExtension.create();
diff --git a/instrumentation/jsonrpc4j-1.6/library/build.gradle.kts b/instrumentation/jsonrpc4j-1.6/library/build.gradle.kts
index 1fc139a66739..f95aefe8f0fb 100644
--- a/instrumentation/jsonrpc4j-1.6/library/build.gradle.kts
+++ b/instrumentation/jsonrpc4j-1.6/library/build.gradle.kts
@@ -2,11 +2,10 @@ plugins {
   id("otel.library-instrumentation")
 }
 
-val jsonrpcVersion = "1.6"
 val jacksonVersion = "2.13.3"
 
 dependencies {
-  library("com.github.briandilley.jsonrpc4j:jsonrpc4j:$jsonrpcVersion")
+  library("com.github.briandilley.jsonrpc4j:jsonrpc4j:1.6")
 
   implementation("com.fasterxml.jackson.core:jackson-databind:$jacksonVersion")