diff --git a/modules/openapi-generator-cli/pom.xml b/modules/openapi-generator-cli/pom.xml
index 75ae7edbab33..8810ba8ac1cd 100644
--- a/modules/openapi-generator-cli/pom.xml
+++ b/modules/openapi-generator-cli/pom.xml
@@ -20,7 +20,6 @@
                 <directory>src/main/resources</directory>
                 <filtering>true</filtering>
                 <excludes>
-                    <exclude>logback.xml</exclude>
                 </excludes>
             </resource>
         </resources>
@@ -78,6 +77,12 @@
             <groupId>org.openapitools</groupId>
             <artifactId>openapi-generator</artifactId>
             <version>${project.version}</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-simple</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <!--https://github.com/airlift/airline-->
         <dependency>
@@ -91,9 +96,9 @@
             <version>2.3.3</version>
         </dependency>
         <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-simple</artifactId>
-            <version>${slf4j-version}</version>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>1.0.13</version>
         </dependency>
         <dependency>
             <groupId>org.testng</groupId>
diff --git a/modules/openapi-generator-cli/src/main/resources/logback.xml b/modules/openapi-generator-cli/src/main/resources/logback.xml
index 3bd0c92d369c..91effef2e981 100644
--- a/modules/openapi-generator-cli/src/main/resources/logback.xml
+++ b/modules/openapi-generator-cli/src/main/resources/logback.xml
@@ -1,12 +1,34 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-        <layout class="ch.qos.logback.classic.PatternLayout">
-            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
-        </layout>
+        <target>System.out</target>
+        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
+            <pattern>[%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+        <filter class="ch.qos.logback.classic.filter.LevelFilter">
+            <level>ERROR</level>
+            <onMatch>DENY</onMatch>
+            <onMismatch>NEUTRAL</onMismatch>
+        </filter>
     </appender>
-    <logger name="io.swagger" level="debug"/>
-    <root level="error">
+    <appender name="STDERR" class="ch.qos.logback.core.ConsoleAppender">
+        <target>System.err</target>
+        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
+            <pattern>[%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
+            <level>ERROR</level>
+        </filter>
+    </appender>
+    <logger name="io.swagger" level="warn">
         <appender-ref ref="STDOUT"/>
+        <appender-ref ref="STDERR"/>
+    </logger>
+    <logger name="org.openapitools" level="info">
+        <appender-ref ref="STDOUT"/>
+        <appender-ref ref="STDERR"/>
+    </logger>
+    <root level="error">
+        <appender-ref ref="STDERR"/>
     </root>
 </configuration>
diff --git a/modules/openapi-generator/pom.xml b/modules/openapi-generator/pom.xml
index 96dfc3f3a241..b72908a01889 100644
--- a/modules/openapi-generator/pom.xml
+++ b/modules/openapi-generator/pom.xml
@@ -243,11 +243,6 @@
             <artifactId>slf4j-api</artifactId>
             <version>${slf4j-version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-simple</artifactId>
-            <version>${slf4j-version}</version>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
diff --git a/modules/openapi-generator/src/main/resources/logback.xml b/modules/openapi-generator/src/main/resources/logback.xml
deleted file mode 100644
index 010fdca0cfe7..000000000000
--- a/modules/openapi-generator/src/main/resources/logback.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<configuration>
-    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-        <layout class="ch.qos.logback.classic.PatternLayout">
-            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
-        </layout>
-    </appender>
-    <logger name="io.swagger" level="DEBUG"/>
-    <root level="error">
-        <appender-ref ref="STDOUT"/>
-    </root>
-</configuration>
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/php/PhpModelTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/php/PhpModelTest.java
index 1f4cf3818f68..8e496e294a81 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/php/PhpModelTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/php/PhpModelTest.java
@@ -33,8 +33,6 @@
 import org.openapitools.codegen.CodegenProperty;
 import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.languages.PhpClientCodegen;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.testng.Assert;
 import org.testng.annotations.DataProvider;
 import org.testng.annotations.Test;
@@ -46,7 +44,6 @@
 
 @SuppressWarnings("static-method")
 public class PhpModelTest {
-    private static final Logger LOGGER = LoggerFactory.getLogger(PhpModelTest.class);
 
     @Test(description = "convert a simple php model")
     public void simpleModelTest() {