diff --git a/src/main/java/org/jfrog/buildinfo/deployment/BuildInfoRecorder.java b/src/main/java/org/jfrog/buildinfo/deployment/BuildInfoRecorder.java
index 6e553e6..09f9acf 100644
--- a/src/main/java/org/jfrog/buildinfo/deployment/BuildInfoRecorder.java
+++ b/src/main/java/org/jfrog/buildinfo/deployment/BuildInfoRecorder.java
@@ -223,7 +223,9 @@ private void addDependencies(MavenProject project) {
 
         // if recordAllDependencies=true, add build time dependencies
         if (conf.publisher.isRecordAllDependencies()) {
-            dependencies.addAll(buildTimeDependencies);
+            synchronized(buildTimeDependencies) {
+                dependencies.addAll(buildTimeDependencies);
+            }
         }
 
         currentModuleDependencies.set(dependencies);