diff --git a/README.md b/README.md
index 1aee889e..b2c84a30 100644
--- a/README.md
+++ b/README.md
@@ -148,9 +148,11 @@ For this, we just need to specify three things:
 3. The number of designs we want
 
 ```
-./scripts/run_inference.py 'contigmap.contigs=[150-150]' inference.output_prefix=test_outputs/test inference.num_designs=10
+python ./scripts/run_inference.py 'contigmap.contigs=[150-150]' inference.output_prefix=test_outputs/test inference.num_designs=10
 ```
 
+(Use `python3` instead, if you have `python` point to python2.)
+
 Let's look at this in detail.
 Firstly, what is `contigmap.contigs`?
 Hydra configs tell the inference script how it should be run. To keep things organised, the config has different sub-configs, one of them being `contigmap`, which pertains to everything related to the contig string (that defines the protein being built).