diff --git a/java-design-patterns-teacher/pom.xml b/java-design-patterns-teacher/pom.xml
old mode 100755
new mode 100644
index f9f788b..b65e2e2
--- a/java-design-patterns-teacher/pom.xml
+++ b/java-design-patterns-teacher/pom.xml
@@ -129,7 +129,7 @@
         <dependency>
             <groupId>commons-collections</groupId>
             <artifactId>commons-collections</artifactId>
-            <version>3.2.1</version>
+            <version>3.2.2</version>
         </dependency>