I'm not sure what you mean by "increase" as it sounds like you want it to be smaller (decrease)?
There is a "thin" runtime which is smaller and will be used in cases where certain features are not present in your document. Please see this post that shows when:
If you don't use these features, and don't want the full runtime, then you can use the File > Advanced Export… feature and make/use an export slice that unchecks "Support Internet Explorer 6-9". Then it will not export with only the thin runtime.