diff --git a/schemas/JSON/manifests/v1.5.0/manifest.defaultLocale.1.5.0.json b/schemas/JSON/manifests/v1.5.0/manifest.defaultLocale.1.5.0.json
index ecb64b306e..d081e9e61a 100644
--- a/schemas/JSON/manifests/v1.5.0/manifest.defaultLocale.1.5.0.json
+++ b/schemas/JSON/manifests/v1.5.0/manifest.defaultLocale.1.5.0.json
@@ -234,7 +234,7 @@
     "InstallationNotes": {
       "type": [ "string", "null" ],
       "minLength": 1,
-      "maxLength": 256,
+      "maxLength": 10000,
       "description": "The notes displayed to the user upon completion of a package installation."
     },
     "Documentations": {
diff --git a/schemas/JSON/manifests/v1.5.0/manifest.locale.1.5.0.json b/schemas/JSON/manifests/v1.5.0/manifest.locale.1.5.0.json
index 701021126c..bffd87e40f 100644
--- a/schemas/JSON/manifests/v1.5.0/manifest.locale.1.5.0.json
+++ b/schemas/JSON/manifests/v1.5.0/manifest.locale.1.5.0.json
@@ -229,7 +229,7 @@
     "InstallationNotes": {
       "type": [ "string", "null" ],
       "minLength": 1,
-      "maxLength": 256,
+      "maxLength": 10000,
       "description": "The notes displayed to the user upon completion of a package installation."
     },
     "Documentations": {
diff --git a/schemas/JSON/manifests/v1.5.0/manifest.singleton.1.5.0.json b/schemas/JSON/manifests/v1.5.0/manifest.singleton.1.5.0.json
index 036911589c..71afdd2750 100644
--- a/schemas/JSON/manifests/v1.5.0/manifest.singleton.1.5.0.json
+++ b/schemas/JSON/manifests/v1.5.0/manifest.singleton.1.5.0.json
@@ -912,7 +912,7 @@
     "InstallationNotes": {
       "type": [ "string", "null" ],
       "minLength": 1,
-      "maxLength": 256,
+      "maxLength": 10000,
       "description": "The notes displayed to the user upon completion of a package installation."
     },
     "Documentations": {