diff --git a/steps/ometiff_second_stitching.cwl b/steps/ometiff_second_stitching.cwl
index 6da9406..2760689 100644
--- a/steps/ometiff_second_stitching.cwl
+++ b/steps/ometiff_second_stitching.cwl
@@ -36,9 +36,10 @@ steps:
       cytokit_config:
         source: cytokit_config
       num_concurrent_tasks:
-        type: int
-        inputBinding:
-        prefix: "--num_concurrent_tasks"
+       # type: int
+       # inputBinding:
+       # prefix: "--num_concurrent_tasks"
+	source: num_concurrent_tasks
     out:
       - bg_sub_tiles
       - bg_sub_config
diff --git a/steps/run_cytokit.cwl b/steps/run_cytokit.cwl
index ebf5e52..a2bcc9c 100644
--- a/steps/run_cytokit.cwl
+++ b/steps/run_cytokit.cwl
@@ -7,7 +7,7 @@ baseCommand: ["sh", "run_cytokit.sh"]
 requirements:
   DockerRequirement:
     dockerPull: hubmap/cytokit:latest
-  DockerGpuRequirement: {}
+ #DockerGpuRequirement: {}
 
   InitialWorkDirRequirement:
     listing: