I really am just winging it here but attempting to increase the character count limit?

lib/twitter_ebooks/model.rb

@@ -246,7 +246,7 @@ def valid_tweet?(tikis, limit)
     # @param generator [SuffixGenerator, nil]
     # @param retry_limit [Integer] how many times to retry on invalid tweet
     # @return [String]
-    def make_statement(limit=140, generator=nil, retry_limit=10)
+    def make_statement(limit=280, generator=nil, retry_limit=10)
       responding = !generator.nil?
       generator ||= SuffixGenerator.build(@sentences)
 
@@ -316,7 +316,7 @@ def find_relevant(sentences, input)
     # @param limit [Integer] characters available for response
     # @param sentences [Array<Array<Integer>>]
     # @return [String]
-    def make_response(input, limit=140, sentences=@mentions)
+    def make_response(input, limit=280, sentences=@mentions)
       # Prefer mentions
       relevant, slightly_relevant = find_relevant(sentences, input)
 

lib/twitter_ebooks/version.rb

@@ -1,3 +1,3 @@
 module Ebooks
-  VERSION = "3.1.6"
+  VERSION = "3.1.7"
 end

spec/model_spec.rb

@@ -10,13 +10,13 @@ def Process.rss; `ps -o rss= -p #{Process.pid}`.chomp.to_i; end
 
     it "generates a tweet" do
       s = @model.make_statement
-      expect(s.length).to be <= 140
+      expect(s.length).to be <= 280
       puts s
     end
 
     it "generates an appropriate response" do
       s = @model.make_response("hi")
-      expect(s.length).to be <= 140
+      expect(s.length).to be <= 280
       expect(s.downcase).to include("hi")
       puts s
     end