diff --git a/charts/spire/README.md b/charts/spire/README.md
index b842370..ea60ab5 100644
--- a/charts/spire/README.md
+++ b/charts/spire/README.md
@@ -17,7 +17,7 @@ A Helm chart for deploying the complete Spire stack including: spire-server, spi
 
 | Dependency | Supported Versions |
 |:-----------|:-------------------|
-| SPIRE      | `1.5.3+`, `1.6.x`  |
+| SPIRE      | `1.5.3+`, `1.6.3+` |
 | Helm       | `3.x`              |
 | Kubernetes | `1.21+`            |
 
diff --git a/charts/spire/README.md.gotmpl b/charts/spire/README.md.gotmpl
index 70823d0..f2dd15d 100644
--- a/charts/spire/README.md.gotmpl
+++ b/charts/spire/README.md.gotmpl
@@ -19,7 +19,7 @@
 
 | Dependency | Supported Versions |
 |:-----------|:-------------------|
-| SPIRE      | `1.5.3+`, `1.6.x`  |
+| SPIRE      | `1.5.3+`, `1.6.3+` |
 | Helm       | `3.x`              |
 | Kubernetes | `1.21+`            |