ERROR pod installation

[fullstact69]

I created the clean project with objective c. And I made the pod file, and added one line like this.
pod 'AuthorizeNetAccept'

But when I try to run pod install, it shows error

pod install
Analyzing dependencies
Downloading dependencies
Installing AuthorizeNetAccept (0.5.0)
[!] Unable to determine Swift version for the following pods:

• AuthorizeNetAccept does not specify a Swift version and none of the targets (MYTARGET) integrating it have the SWIFT_VERSION attribute set. Please contact the author or set the SWIFT_VERSION attribute in at least one of the targets that integrate this pod.

How can I resolve this?