diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/pom.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/pom.mustache
index fb2d2bdfab7..e8605bbac61 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/pom.mustache
@@ -140,13 +140,11 @@
                 <version>3.6.1</version>
                 <configuration>
                     {{#java8}}
-                        <source>
-                        1.8</source>
+                        <source>1.8</source>
                         <target>1.8</target>
                     {{/java8}}
                     {{^java8}}
-                        <source>
-                        1.7</source>
+                        <source>1.7</source>
                         <target>1.7</target>
                     {{/java8}}
                 </configuration>
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/pom.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/pom.mustache
index 2dff93306a0..85f38605dd8 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/pom.mustache
@@ -140,13 +140,11 @@
                 <version>3.6.1</version>
                 <configuration>
                     {{#java8}}
-                        <source>
-                        1.8</source>
+                        <source>1.8</source>
                         <target>1.8</target>
                     {{/java8}}
                     {{^java8}}
-                        <source>
-                        1.7</source>
+                        <source>1.7</source>
                         <target>1.7</target>
                     {{/java8}}
                 </configuration>
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/pom.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/pom.mustache
index 2b4a9aa5537..456bee18137 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/pom.mustache
@@ -121,13 +121,11 @@
                 <version>2.5.1</version>
                 <configuration>
                     {{#java8}}
-                        <source>
-                        1.8</source>
+                        <source>1.8</source>
                         <target>1.8</target>
                     {{/java8}}
                     {{^java8}}
-                        <source>
-                        1.7</source>
+                        <source>1.7</source>
                         <target>1.7</target>
                     {{/java8}}
                 </configuration>
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/pom.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/pom.mustache
index e2bdc3a8b68..01abe39efb5 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/pom.mustache
@@ -140,13 +140,11 @@
                 <version>3.6.1</version>
                 <configuration>
                     {{#java8}}
-                        <source>
-                        1.8</source>
+                        <source>1.8</source>
                         <target>1.8</target>
                     {{/java8}}
                     {{^java8}}
-                        <source>
-                        1.7</source>
+                        <source>1.7</source>
                         <target>1.7</target>
                     {{/java8}}
                 </configuration>
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/vertx/pom.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/vertx/pom.mustache
index d524edeaa94..32f94b62639 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/vertx/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/vertx/pom.mustache
@@ -139,8 +139,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.6.1</version>
                 <configuration>
-                    <source>
-                    1.8</source>
+                    <source>1.8</source>
                     <target>1.8</target>
                 </configuration>
             </plugin>
diff --git a/modules/openapi-generator/src/main/resources/Java/pom.mustache b/modules/openapi-generator/src/main/resources/Java/pom.mustache
index 3de31865335..7e61c4c05ad 100644
--- a/modules/openapi-generator/src/main/resources/Java/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/pom.mustache
@@ -140,13 +140,11 @@
                 <version>3.6.1</version>
                 <configuration>
                     {{#java8}}
-                        <source>
-                        1.8</source>
+                        <source>1.8</source>
                         <target>1.8</target>
                     {{/java8}}
                     {{^java8}}
-                        <source>
-                        1.7</source>
+                        <source>1.7</source>
                         <target>1.7</target>
                     {{/java8}}
                 </configuration>
diff --git a/modules/openapi-generator/src/main/resources/codegen/pom.mustache b/modules/openapi-generator/src/main/resources/codegen/pom.mustache
index 2d01469c986..59c837ae3f4 100644
--- a/modules/openapi-generator/src/main/resources/codegen/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/codegen/pom.mustache
@@ -99,8 +99,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.6.1</version>
                 <configuration>
-                    <source>
-                    1.7</source>
+                    <source>1.7</source>
                     <target>1.7</target>
                 </configuration>
             </plugin>
diff --git a/modules/openapi-generator/src/main/resources/scala/pom.mustache b/modules/openapi-generator/src/main/resources/scala/pom.mustache
index 5cfa0e2f198..e720f32e7e9 100644
--- a/modules/openapi-generator/src/main/resources/scala/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/scala/pom.mustache
@@ -124,8 +124,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.6.1</version>
                 <configuration>
-                    <source>
-                    1.7</source>
+                    <source>1.7</source>
                     <target>1.7</target>
                 </configuration>
             </plugin>
diff --git a/modules/openapi-generator/src/test/resources/2_0/templates/Java/libraries/jersey2/pom.mustache b/modules/openapi-generator/src/test/resources/2_0/templates/Java/libraries/jersey2/pom.mustache
index 98a0e9473a8..5260709d02c 100644
--- a/modules/openapi-generator/src/test/resources/2_0/templates/Java/libraries/jersey2/pom.mustache
+++ b/modules/openapi-generator/src/test/resources/2_0/templates/Java/libraries/jersey2/pom.mustache
@@ -141,13 +141,11 @@
                 <version>2.5.1</version>
                 <configuration>
                     {{#java8}}
-                        <source>
-                        1.8</source>
+                        <source>1.8</source>
                         <target>1.8</target>
                     {{/java8}}
                     {{^java8}}
-                        <source>
-                        1.7</source>
+                        <source>1.7</source>
                         <target>1.7</target>
                     {{/java8}}
                 </configuration>