diff --git a/CPAT.wdl b/CPAT.wdl
index b92053d1e1fcdbe116fc845c845442fd1b7aeecc..53aeac94a84f05cdd2fd2d211c5fca4e96b62154 100644
--- a/CPAT.wdl
+++ b/CPAT.wdl
@@ -30,7 +30,7 @@ task CPAT {
     }
 
     output {
-        File outFile=outFilePath
+        File outFile = outFilePath
     }
 
     runtime {
diff --git a/collect-columns.wdl b/collect-columns.wdl
index 910aeac255dc07afc22068896d69aa81ef56fed8..edd674380e565aa98e9ff4a0e5ae2bca326469d9 100644
--- a/collect-columns.wdl
+++ b/collect-columns.wdl
@@ -37,7 +37,7 @@ task CollectColumns {
     }
 
     runtime {
-        memory: 4 + ceil(0.5* length(inputTables))
+        memory: 4 + ceil(0.5 * length(inputTables))
         docker: dockerImage
     }
 }
\ No newline at end of file
diff --git a/somaticseq.wdl b/somaticseq.wdl
index 7a25a0817950525000d53e2b13eccf4d79bfa323..450152554c244306819917310f54ba891667c6df 100644
--- a/somaticseq.wdl
+++ b/somaticseq.wdl
@@ -273,7 +273,7 @@ task ModifyStrelka {
         String installDir = "/opt/somaticseq/vcfModifier" #the location in the docker image
 
         File strelkaVCF
-        String? outputVCFName = basename(strelkaVCF, ".gz")
+        String outputVCFName = basename(strelkaVCF, ".gz")
 
         Int threads = 1
         String dockerImage = "lethalfang/somaticseq:3.1.0"