diff --git a/wercker.yml b/wercker.yml
index 61e91c014..b4990bd2e 100644
--- a/wercker.yml
+++ b/wercker.yml
@@ -71,7 +71,7 @@ build:
         && 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: ${CS_POM_VERSION}
         && echo "checkouting project sources ..."
-        && svn -q export https://svn.code.sf.net/p/htmlunit/code/trunk/htmlunit htmlunit
+        && svn -q export https://svn.code.sf.net/p/htmlunit/code/trunk/htmlunit@13543 htmlunit
         && cd htmlunit
         && echo "Running checkstyle validation ..."
         && mvn compile checkstyle:check -Dcheckstyle.version=${CS_POM_VERSION}