diff --git a/README.md b/README.md
index e0c88bb..543a5e3 100644
--- a/README.md
+++ b/README.md
@@ -166,9 +166,10 @@ mkdir sif
 cd sif
 cwl-docker-extract --singularity . Pathto/workflow/main.cwl
 ```
-### Step 1. Set the environment variable in conda env_var.sh file.
+### Step 2. Set the environment variable in conda env_var.sh file.
 Just like the conda environment Step 2.
 However, the `APPTAINER_CACHEDIR` still have to be setted by each user, because it has to be unique to user. [Ref.](https://docs.sylabs.io/guides/latest/user-guide/build_env.html)
+
 ## Example
 In the test example, we utilize the yeast data as an example. The example folder contains the reference sequence of R64, and the processed SRA accession is SRR23631020.