diff --git a/changelog/unreleased/kong/fix_ai_prompt_decorator_content_length.yml b/changelog/unreleased/kong/fix_ai_prompt_decorator_content_length.yml
new file mode 100644
index 00000000000..261dc0dbcd7
--- /dev/null
+++ b/changelog/unreleased/kong/fix_ai_prompt_decorator_content_length.yml
@@ -0,0 +1,4 @@
+message: |
+  Fixed an issue where the `ai-prompt-decorator` plugin prompt field was too short.
+type: feature
+scope: Plugin
diff --git a/kong/plugins/ai-prompt-decorator/schema.lua b/kong/plugins/ai-prompt-decorator/schema.lua
index a0a83bc71c0..d1556ba9379 100644
--- a/kong/plugins/ai-prompt-decorator/schema.lua
+++ b/kong/plugins/ai-prompt-decorator/schema.lua
@@ -5,7 +5,7 @@ local prompt_record = {
   required = false,
   fields = {
     { role = { type = "string", required = true, one_of = { "system", "assistant", "user" }, default = "system" }},
-    { content = { type = "string", required = true, len_min = 1, len_max = 500 } },
+    { content = { type = "string", required = true, len_min = 1, len_max = 100000 } },
   }
 }