diff --git a/.travis.yml b/.travis.yml
index 88d977926..84177f6bf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,6 @@ env:
   - secure: "VmS4He99YlI6rdmw8Q25OZ9kUp11sRbt0W1QMBvA5lzNSmhN1Q1KtaMj9AGwpCZWcyGWri4AQxEmloARxACxQHXRmNE7ro2DESGw46RAocBAf+RfBxYTifIyUGu5TnSCQhz56SkgpyWpedZAZWyah9ZxgUMfet4KXFUfeiUgYQA="
   
 before_install:
-  - sudo apt-get install -y procps
   - wget -O ~/codacy-coverage-reporter-assembly-latest.jar https://github.com/codacy/codacy-coverage-reporter/releases/download/2.0.0/codacy-coverage-reporter-2.0.0-assembly.jar
   # create test database for mysql, mariadb and postgresql
   - mysql -u root -e 'CREATE DATABASE test_db;'
diff --git a/extensions/database/pom.xml b/extensions/database/pom.xml
index b36bb7ad5..bc4ed6d22 100644
--- a/extensions/database/pom.xml
+++ b/extensions/database/pom.xml
@@ -177,7 +177,7 @@
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>2.8.9</version>
+      <version>2.23.4</version>
       <scope>test</scope>
     </dependency>
 
diff --git a/extensions/wikidata/pom.xml b/extensions/wikidata/pom.xml
index 644de7c52..d11858f4b 100644
--- a/extensions/wikidata/pom.xml
+++ b/extensions/wikidata/pom.xml
@@ -202,7 +202,7 @@
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>2.8.9</version>
+      <version>2.23.4</version>
       <scope>test</scope>
     </dependency>
 
diff --git a/main/pom.xml b/main/pom.xml
index bea92fffa..57977f2d6 100644
--- a/main/pom.xml
+++ b/main/pom.xml
@@ -61,10 +61,9 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.1</version>
+        <version>3.8.0</version>
         <configuration>
-          <source>1.8</source>
-          <target>1.8</target>
+	  <!--release>11</release-->
           <encoding>UTF-8</encoding>
           <showDeprecation>false</showDeprecation>
         </configuration>
@@ -454,7 +453,7 @@
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>2.8.9</version>
+      <version>2.23.4</version>
       <scope>test</scope>
     </dependency>
     <dependency>