diff --git a/README.md b/README.md
index ccb31f0..bd6511d 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ If you are using an older version of packer or are still using json templates yo
 ## Developing the builder
 
 ### Dependencies
-* Packer >= v1.8.x (https://packer.io)
+* Packer >= v1.7.1 (https://packer.io)
 * XenServer / Citrix Hypervisor > 7.6
 * Golang 1.16
 
diff --git a/examples/README.md b/examples/README.md
index ede7545..c19d589 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -7,7 +7,8 @@ In order to see an exhaustive list of configuration options for the packer build
 ### Running the examples
 
 In order to run the examples you will need to perform the following steps:
-1. Export those vars:
+1. Install packer 1.8 or later (the Ubuntu example requires the `http` data source)
+2. Export those vars:
 ```
 PKR_VAR_remote_host
 PKR_VAR_remote_password
@@ -17,9 +18,9 @@ PKR_VAR_sr_iso_name
 ``` 
 `PKR_VAR_remote_host` must be the resource pool primary, aka the master.
 
-2. Run `packer init path/to/defenition.pkr.hcl` to download the xenserver plugin
+3. Run `packer init path/to/defenition.pkr.hcl` to download the xenserver plugin
 
-2. Run `packer build  path/to/defenition.pkr.hcl`   
+4. Run `packer build  path/to/defenition.pkr.hcl`   
 so for example:
 `packer build  examples/centos/centos8-netinstall.pkr.hcl`