diff --git a/website/source/guides/upgrade/index.html.md b/website/source/guides/upgrade/index.html.md
index 64484196f..6baeb7bc6 100644
--- a/website/source/guides/upgrade/index.html.md
+++ b/website/source/guides/upgrade/index.html.md
@@ -17,6 +17,13 @@ communication with Servers. As such, care should be taken to properly
 upgrade Nomad to ensure minimal service disruption. Unsafe upgrades can
 cause a service outage.
 
+~> **Downgrade Warning!** We currently do not support safely downgrading
+Nomad servers. This is due to the fact that the data directory
+contains transaction logs which may not safely apply after a downgrade. To downgrade
+a Nomad server, its data directory must be wiped out. In general, Client downgrades are
+safe to do, however we recommend checking the [upgrade specific](/guides/upgrade/upgrade-specific.html)
+page which will highlight versions where a client downgrade is not supported.
+
 ## Upgrade Process
 
 For upgrades we strive to ensure backwards compatibility. For most upgrades, the
diff --git a/website/source/guides/upgrade/upgrade-specific.html.md b/website/source/guides/upgrade/upgrade-specific.html.md
index fecbe2ed6..aa084261b 100644
--- a/website/source/guides/upgrade/upgrade-specific.html.md
+++ b/website/source/guides/upgrade/upgrade-specific.html.md
@@ -107,6 +107,11 @@ unchanged.
 Since HCL2 uses dotted object notation for interpolation users should
 transition away from variable names with multiple consecutive dots.
 
+### Downgrading clients
+Due to the large refactor of the Nomad client in 0.9, downgrading to a
+previous version of the client after upgrading it to Nomad 0.9 is not supported.
+To downgrade safely, users should erase the Nomad client's data directory.
+
 ## Nomad 0.8.0
 
 ### Raft Protocol Version Compatibility