README.md in sparql-1.1.2.1 vs README.md in sparql-1.1.3

@@ -109,10 +109,10 @@
 {Rack::SPARQL} middleware, which implements SPARQL
  content negotiation for Rack applications. {Sinatra::SPARQL} also supports
  [SPARQL 1.1 Service Description][].
 
 The middleware queries [RDF.rb][] for the MIME content types of known RDF
-serialization formats, so it will work with whatever serialization plugins
+serialization formats, so it will work with whatever serialization extensions
 that are currently available for RDF.rb. (At present, this includes support
 for N-Triples, N-Quads, Turtle, RDF/XML, RDF/JSON, JSON-LD, RDFa, TriG and TriX.)
 
 ### Remote datasets