diff --git a/manta.wdl b/manta.wdl
index e8f118670381098e5fecb84def0eb401ab048d71..a80ec832f4d3abb752d782586146d35acd2f4fd2 100644
--- a/manta.wdl
+++ b/manta.wdl
@@ -117,7 +117,7 @@ task Germline {
     runtime {
         cpu: cores
         memory: memory
-        docker: docker: "quay.io/biocontainers/manta:" + dockerTag
+        docker: "quay.io/biocontainers/manta:" + dockerTag
     }
 }