diff --git a/CI/pom.xml.bash b/CI/pom.xml.bash
index ce01054fa93..fed1ea7851a 100644
--- a/CI/pom.xml.bash
+++ b/CI/pom.xml.bash
@@ -179,7 +179,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.8.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
@@ -188,7 +188,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>3.0.2</version>
+                <version>3.1.0</version>
                 <configuration>
                     <archive>
                         <manifestEntries>
@@ -203,7 +203,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -250,7 +250,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-enforcer-plugin</artifactId>
-                <version>1.4.1</version>
+                <version>3.0.0-M2</version>
                 <executions>
                     <execution>
                         <id>enforce-versions</id>
@@ -260,7 +260,7 @@
                         <configuration>
                             <rules>
                                 <requireMavenVersion>
-                                    <version>3.2.5</version>
+                                    <version>3.3.3</version>
                                 </requireMavenVersion>
                             </rules>
                         </configuration>
@@ -869,7 +869,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.5</version>
+                <version>3.0.0</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>
@@ -877,7 +877,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.9</version>
+                <version>3.0.0</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -934,7 +934,7 @@
         <scala-maven-plugin-version>3.2.1</scala-maven-plugin-version>
         <jmustache-version>1.14</jmustache-version>
         <testng-version>6.9.6</testng-version>
-        <surefire-version>2.19.1</surefire-version>
+        <surefire-version>2.22.0</surefire-version>
         <jmockit-version>1.25</jmockit-version>
         <reflections-version>0.9.10</reflections-version>
         <spring-boot-version>2.0.2.RELEASE</spring-boot-version>
diff --git a/CI/pom.xml.circleci b/CI/pom.xml.circleci
index 18982ec6537..e0c80b29830 100644
--- a/CI/pom.xml.circleci
+++ b/CI/pom.xml.circleci
@@ -183,7 +183,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.8.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
@@ -192,7 +192,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>3.0.2</version>
+                <version>3.1.0</version>
                 <configuration>
                     <archive>
                         <manifestEntries>
@@ -207,7 +207,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -980,7 +980,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.5</version>
+                <version>3.0.0</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>
@@ -988,7 +988,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.9</version>
+                <version>3.0.0</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -1045,7 +1045,7 @@
         <scala-maven-plugin-version>3.2.1</scala-maven-plugin-version>
         <jmustache-version>1.14</jmustache-version>
         <testng-version>6.9.6</testng-version>
-        <surefire-version>2.19.1</surefire-version>
+        <surefire-version>2.22.0</surefire-version>
         <jmockit-version>1.25</jmockit-version>
         <reflections-version>0.9.10</reflections-version>
         <spring-boot-version>2.0.2.RELEASE</spring-boot-version>
diff --git a/CI/pom.xml.circleci.java7 b/CI/pom.xml.circleci.java7
index aac64414e8a..d8fdc922e83 100644
--- a/CI/pom.xml.circleci.java7
+++ b/CI/pom.xml.circleci.java7
@@ -183,7 +183,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.8.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
@@ -192,7 +192,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>3.0.2</version>
+                <version>3.1.0</version>
                 <configuration>
                     <archive>
                         <manifestEntries>
@@ -207,7 +207,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -949,7 +949,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.5</version>
+                <version>3.0.0</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>
@@ -957,7 +957,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.9</version>
+                <version>3.0.0</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -1014,7 +1014,7 @@
         <scala-maven-plugin-version>3.2.1</scala-maven-plugin-version>
         <jmustache-version>1.12</jmustache-version>
         <testng-version>6.9.6</testng-version>
-        <surefire-version>2.19.1</surefire-version>
+        <surefire-version>2.22.0</surefire-version>
         <jmockit-version>1.25</jmockit-version>
         <reflections-version>0.9.10</reflections-version>
         <spring-boot-version>2.0.2.RELEASE</spring-boot-version>
diff --git a/CI/pom.xml.ios b/CI/pom.xml.ios
index ff0dc36ab9b..8e41dc3b013 100644
--- a/CI/pom.xml.ios
+++ b/CI/pom.xml.ios
@@ -179,7 +179,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.8.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
@@ -188,7 +188,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>3.0.2</version>
+                <version>3.1.0</version>
                 <configuration>
                     <archive>
                         <manifestEntries>
@@ -203,7 +203,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -877,7 +877,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.5</version>
+                <version>3.0.0</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>
@@ -885,7 +885,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.9</version>
+                <version>3.0.0</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -942,7 +942,7 @@
         <scala-maven-plugin-version>3.2.1</scala-maven-plugin-version>
         <jmustache-version>1.14</jmustache-version>
         <testng-version>6.9.6</testng-version>
-        <surefire-version>2.19.1</surefire-version>
+        <surefire-version>2.22.0</surefire-version>
         <jmockit-version>1.25</jmockit-version>
         <reflections-version>0.9.10</reflections-version>
         <spring-boot-version>2.0.2.RELEASE</spring-boot-version>
diff --git a/modules/openapi-generator-cli/pom.xml b/modules/openapi-generator-cli/pom.xml
index fb6899f8059..e942cf17f71 100644
--- a/modules/openapi-generator-cli/pom.xml
+++ b/modules/openapi-generator-cli/pom.xml
@@ -38,7 +38,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>2.3</version>
+                <version>3.2.0</version>
                 <executions>
                     <execution>
                         <id>process-resources</id>
diff --git a/modules/openapi-generator-maven-plugin/pom.xml b/modules/openapi-generator-maven-plugin/pom.xml
index d64a487f283..5b2e8e26a5c 100644
--- a/modules/openapi-generator-maven-plugin/pom.xml
+++ b/modules/openapi-generator-maven-plugin/pom.xml
@@ -11,9 +11,6 @@
     <name>openapi-generator (maven-plugin)</name>
     <packaging>maven-plugin</packaging>
     <description>maven plugin to build modules from OpenAPI Generator</description>
-    <prerequisites>
-        <maven>3.2.5</maven>
-    </prerequisites>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
@@ -62,7 +59,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-plugin-plugin</artifactId>
-                    <version>3.5.1</version>
+                    <version>3.5.2</version>
                     <configuration>
                         <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
                     </configuration>
diff --git a/modules/openapi-generator/pom.xml b/modules/openapi-generator/pom.xml
index bc3ce0ab8f2..97687baf74d 100644
--- a/modules/openapi-generator/pom.xml
+++ b/modules/openapi-generator/pom.xml
@@ -44,7 +44,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>
-                <version>1.5.0</version>
+                <version>1.6.0</version>
                 <executions>
                     <execution>
                         <goals>
@@ -81,7 +81,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>3.0.2</version>
+                <version>3.1.0</version>
                 <configuration>
                     <archive>
                         <manifestEntries>
@@ -103,7 +103,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -174,7 +174,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.5</version>
+                <version>3.0.0</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>
@@ -182,7 +182,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.9</version>
+                <version>3.0.0</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -195,7 +195,7 @@
     </reporting>
     <properties>
         <diffutils-version>1.3.0</diffutils-version>
-        <guava-version>20.0</guava-version>
+        <guava-version>26.0-jre</guava-version>
     </properties>
     <dependencies>
         <dependency>
@@ -270,12 +270,12 @@
         <dependency>
            <groupId>com.atlassian.commonmark</groupId>
            <artifactId>commonmark</artifactId>
-           <version>0.9.0</version>
+           <version>0.11.0</version>
         </dependency>
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>2.8.47</version>
+            <version>2.23.0</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/pom.xml b/pom.xml
index 3e577522dfb..eb4fd035f04 100644
--- a/pom.xml
+++ b/pom.xml
@@ -189,7 +189,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.8.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
@@ -198,7 +198,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>3.0.2</version>
+                <version>3.1.0</version>
                 <configuration>
                     <archive>
                         <manifestEntries>
@@ -213,7 +213,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -260,7 +260,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-enforcer-plugin</artifactId>
-                <version>1.4.1</version>
+                <version>3.0.0-M2</version>
                 <executions>
                     <execution>
                         <id>enforce-versions</id>
@@ -280,7 +280,7 @@
             <plugin>
                 <groupId>de.thetaphi</groupId>
                 <artifactId>forbiddenapis</artifactId>
-                <version>2.5</version>
+                <version>2.6</version>
                 <configuration>
                     <bundledSignatures>
                         <!--
@@ -1098,7 +1098,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.5</version>
+                <version>3.0.0</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>
@@ -1106,7 +1106,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.9</version>
+                <version>3.0.0</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -1165,7 +1165,7 @@
         <scala-maven-plugin-version>3.2.1</scala-maven-plugin-version>
         <jmustache-version>1.14</jmustache-version>
         <testng-version>6.9.6</testng-version>
-        <surefire-version>2.19.1</surefire-version>
+        <surefire-version>2.22.0</surefire-version>
         <jmockit-version>1.25</jmockit-version>
         <reflections-version>0.9.10</reflections-version>
         <spring-boot-version>2.0.2.RELEASE</spring-boot-version>