diff --git a/dd-java-agent/instrumentation/glassfish-4.1/glassfish-4.1.gradle b/dd-java-agent/instrumentation/glassfish-4.1/glassfish-4.1.gradle
index 058471f997..119670b77b 100644
--- a/dd-java-agent/instrumentation/glassfish-4.1/glassfish-4.1.gradle
+++ b/dd-java-agent/instrumentation/glassfish-4.1/glassfish-4.1.gradle
@@ -6,7 +6,7 @@ muzzle {
   pass {
     group = 'org.glassfish.main.extras'
     module = 'glassfish-embedded-all'
-    versions = "[4.1,5("
+    versions = "[4.1,4.1.2)"
   }
 }
 
diff --git a/dd-java-agent/instrumentation/glassfish-4.1/src/main/java/datadog/trace/instrumentation/glassfish4/GlassfishInstrumentation.java b/dd-java-agent/instrumentation/glassfish-4.1/src/main/java/datadog/trace/instrumentation/glassfish4/GlassfishInstrumentation.java
index 0c83b157ec..a0fe237764 100644
--- a/dd-java-agent/instrumentation/glassfish-4.1/src/main/java/datadog/trace/instrumentation/glassfish4/GlassfishInstrumentation.java
+++ b/dd-java-agent/instrumentation/glassfish-4.1/src/main/java/datadog/trace/instrumentation/glassfish4/GlassfishInstrumentation.java
@@ -58,12 +58,6 @@ public final class GlassfishInstrumentation extends Instrumenter.Default {
         @Advice.Argument(value = 0, readOnly = false) String name) {
       for (String prefix : Constants.BOOTSTRAP_PACKAGE_PREFIXES) {
         if (name.startsWith(prefix)) {
-          if (log.isDebugEnabled()) {
-            log.debug(
-                "Prevented blacklisting of class {}. Stack trace is: \n{}",
-                name,
-                Utils.getStackTraceAsString());
-          }
           name = "__datadog_no_blacklist." + name;
           break;
         }