diff --git a/modules/flowable-engine/src/main/java/org/flowable/engine/impl/bpmn/behavior/ShellActivityBehavior.java b/modules/flowable-engine/src/main/java/org/flowable/engine/impl/bpmn/behavior/ShellActivityBehavior.java
index c6587262f89..e3a706a57d2 100644
--- a/modules/flowable-engine/src/main/java/org/flowable/engine/impl/bpmn/behavior/ShellActivityBehavior.java
+++ b/modules/flowable-engine/src/main/java/org/flowable/engine/impl/bpmn/behavior/ShellActivityBehavior.java
@@ -146,14 +146,11 @@ public static String convertStreamToStr(InputStream is) throws IOException {
             Writer writer = new StringWriter();
 
             char[] buffer = new char[1024];
-            try {
-                Reader reader = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8));
+            try (Reader reader = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8))) {
                 int n;
                 while ((n = reader.read(buffer)) != -1) {
                     writer.write(buffer, 0, n);
                 }
-            } finally {
-                is.close();
             }
             return writer.toString();
         } else {