diff --git a/jenkins-build-all b/jenkins-build-all
index 6ae96767..cbac12c2 100755
--- a/jenkins-build-all
+++ b/jenkins-build-all
@@ -95,6 +95,9 @@ else
     sed -i '/^wiki_/d' config.yml
 fi
 
+# force global timeout to 6 hours
+sed -Ei 's,^(\s+endtime\s*=\s*time\.time\(\))\s*.*,\1 + 6 * 60 * 60  # 6 hours,' fdroidserver/build.py
+
 $WORKSPACE/fdroid build --verbose --latest --no-tarball --all $wikiflag
 
 vagrant global-status