Update dependencies
diff --git a/pom.xml b/pom.xml
index 6f18560..430ee61 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-parent</artifactId>
-    <version>47</version>
+    <version>50</version>
   </parent>
 
   <artifactId>commons-jcs</artifactId>
@@ -319,7 +319,7 @@
       <dependency>
         <groupId>org.apache.commons</groupId>
         <artifactId>commons-dbcp2</artifactId>
-        <version>2.1.1</version>
+        <version>2.7.0</version>
         <optional>true</optional>
       </dependency>
 
@@ -560,8 +560,8 @@
     <commons.javadoc.java.link>https://docs.oracle.com/javase/8/docs/api/</commons.javadoc.java.link>
 
     <jsr107.api.version>1.0.0</jsr107.api.version>
-    <commons.collections.version>4.2</commons.collections.version>
-    <commons.lang.version>3.6</commons.lang.version>
+    <commons.collections.version>4.4</commons.collections.version>
+    <commons.lang.version>3.9</commons.lang.version>
     <commons.clirr.version>2.8</commons.clirr.version>
 
     <test.type>Unit</test.type>