diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/apache-httpclient/pom.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/apache-httpclient/pom.mustache
index 2c7ffb32117..549f284ea12 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/apache-httpclient/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/apache-httpclient/pom.mustache
@@ -45,6 +45,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
                     <fork>true</fork>
                     <meminitial>128m</meminitial>
                     <maxmem>512m</maxmem>
@@ -154,15 +156,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
diff --git a/modules/openapi-generator/src/main/resources/Java/pom.mustache b/modules/openapi-generator/src/main/resources/Java/pom.mustache
index 30a31fdd475..d3145ba6a30 100644
--- a/modules/openapi-generator/src/main/resources/Java/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/pom.mustache
@@ -45,6 +45,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
                     <fork>true</fork>
                     <meminitial>128m</meminitial>
                     <maxmem>512m</maxmem>
@@ -154,15 +156,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
diff --git a/samples/client/petstore/java/apache-httpclient/pom.xml b/samples/client/petstore/java/apache-httpclient/pom.xml
index d7242978e57..3624fb072a3 100644
--- a/samples/client/petstore/java/apache-httpclient/pom.xml
+++ b/samples/client/petstore/java/apache-httpclient/pom.xml
@@ -38,6 +38,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
                     <fork>true</fork>
                     <meminitial>128m</meminitial>
                     <maxmem>512m</maxmem>
@@ -147,15 +149,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
diff --git a/samples/client/petstore/java/jersey1/pom.xml b/samples/client/petstore/java/jersey1/pom.xml
index 1575a0c1c4c..dc57ea3ce78 100644
--- a/samples/client/petstore/java/jersey1/pom.xml
+++ b/samples/client/petstore/java/jersey1/pom.xml
@@ -38,6 +38,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
                     <fork>true</fork>
                     <meminitial>128m</meminitial>
                     <maxmem>512m</maxmem>
@@ -147,15 +149,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>