diff --git a/templates/http-c/content/spin.toml b/templates/http-c/content/spin.toml
index c71c6bedfb..efadfe768f 100644
--- a/templates/http-c/content/spin.toml
+++ b/templates/http-c/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/http-go/content/spin.toml b/templates/http-go/content/spin.toml
index 73d06e2d14..e864c012fb 100644
--- a/templates/http-go/content/spin.toml
+++ b/templates/http-go/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/http-grain/content/spin.toml b/templates/http-grain/content/spin.toml
index 44323d5c5f..c8581bf8c6 100644
--- a/templates/http-grain/content/spin.toml
+++ b/templates/http-grain/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/http-php/content/spin.toml b/templates/http-php/content/spin.toml
index 0ab0b10c3e..f8595629ce 100644
--- a/templates/http-php/content/spin.toml
+++ b/templates/http-php/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/http-rust/content/spin.toml b/templates/http-rust/content/spin.toml
index de01ce2605..bf73cbd473 100644
--- a/templates/http-rust/content/spin.toml
+++ b/templates/http-rust/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/http-zig/content/spin.toml b/templates/http-zig/content/spin.toml
index ae28cc3f02..de03405e77 100644
--- a/templates/http-zig/content/spin.toml
+++ b/templates/http-zig/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/redirect/content/spin.toml b/templates/redirect/content/spin.toml
index b43582d93a..c728a45547 100644
--- a/templates/redirect/content/spin.toml
+++ b/templates/redirect/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/redis-go/content/spin.toml b/templates/redis-go/content/spin.toml
index 7997e51fac..a3b8114583 100644
--- a/templates/redis-go/content/spin.toml
+++ b/templates/redis-go/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/redis-rust/content/spin.toml b/templates/redis-rust/content/spin.toml
index 896929e31d..6cd0f69db0 100644
--- a/templates/redis-rust/content/spin.toml
+++ b/templates/redis-rust/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]
diff --git a/templates/static-fileserver/content/spin.toml b/templates/static-fileserver/content/spin.toml
index a2ff545b41..6f3847e92a 100644
--- a/templates/static-fileserver/content/spin.toml
+++ b/templates/static-fileserver/content/spin.toml
@@ -1,3 +1,5 @@
+#:schema https://github.com/spinframework/spin/releases/download/v3.3.1/manifest.schema.json
+
 spin_manifest_version = 2
 
 [application]