diff --git a/ee/lib/api/ai/experimentation/anthropic.rb b/ee/lib/api/ai/experimentation/anthropic.rb
index 92d0299d4b10c52db5887e30e22d481759802340..db247d275459f2f9b638c2e080bd8f26cd0ab40d 100644
--- a/ee/lib/api/ai/experimentation/anthropic.rb
+++ b/ee/lib/api/ai/experimentation/anthropic.rb
@@ -26,6 +26,7 @@ def anthropic_post(endpoint, json_body: nil)
             headers = {
               "Accept" => ["application/json"],
               "Content-Type" => ["application/json"],
+              "anthropic-version" => "2023-06-01",
               "X-Api-Key" => [anthropic_api_key]
             }
 
diff --git a/ee/spec/requests/api/ai/experimentation/anthropic_spec.rb b/ee/spec/requests/api/ai/experimentation/anthropic_spec.rb
index 0b83ab967f9ea70d7aa54a9b00de9dc15f0535a8..6bb6f362ec4f6eeca772666d4a86f70c7b1f0c83 100644
--- a/ee/spec/requests/api/ai/experimentation/anthropic_spec.rb
+++ b/ee/spec/requests/api/ai/experimentation/anthropic_spec.rb
@@ -16,6 +16,7 @@
       {
         'Accept' => ['application/json'],
         'Content-Type' => ['application/json'],
+        'anthropic-version' => ['2023-06-01'],
         'X-Api-Key' => [anthropic_api_key]
       }
     end