diff --git a/wercker.yml b/wercker.yml
index 5e5055a9d..2fa9bac04 100644
--- a/wercker.yml
+++ b/wercker.yml
@@ -34,8 +34,9 @@ build:
         -Dcheckstyle.ant.skip=true -Dcheckstyle.skip=true -Dxml.skip=true
         && CS_POM_VERSION=$(mvn -q -Dexec.executable='echo' -Dexec.args='${project.version}' --non-recursive org.codehaus.mojo:exec-maven-plugin:1.3.1:exec)
         && echo CS_version: ${CS_POM_VERSION}
+        && git clone https://github.com/Hipparchus-Math/hipparchus.git && cd hipparchus && mvn clean install -DskipTests
         && git clone https://github.com/CS-SI/Orekit.git && cd Orekit
-        && git checkout 5c7355161ae71aaeb94ad9a76a08bfb47a54b970
+        && git checkout 82f2ac9fbaabb4a8e07e4d6643c0d23845cbab42
         && mvn compile checkstyle:check -Dorekit.checkstyle.version=${CS_POM_VERSION}
 
   # NoErrorTest - XWiki (oraclejdk8)