diff --git a/.travis.yml b/.travis.yml
index 78880f1..7281d04 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: java
 jdk:
-  - openjdk15
+  - openjdk11
 
 after_success:
   - mvn test jacoco:report coveralls:report
\ No newline at end of file
diff --git a/lgtm.yml b/lgtm.yml
index 0403bf7..ce1857d 100644
--- a/lgtm.yml
+++ b/lgtm.yml
@@ -1,4 +1,4 @@
 extraction:
   java:
     index:
-      java_version: 14
\ No newline at end of file
+      java_version: 11
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 2a44e50..8b2d759 100644
--- a/pom.xml
+++ b/pom.xml
@@ -182,8 +182,8 @@
     </dependencies>
 
     <properties>
-        <maven.compiler.target>15</maven.compiler.target>
-        <maven.compiler.source>15</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.source>11</maven.compiler.source>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 </project>
\ No newline at end of file